diff --git a/lab0315/a.out b/lab0315/a.out
new file mode 100755
index 0000000000000000000000000000000000000000..4a3ff4123116c320c20be31fe394a71a0288b13a
Binary files /dev/null and b/lab0315/a.out differ
diff --git a/lab0315/h b/lab0315/h
new file mode 100644
index 0000000000000000000000000000000000000000..efb72267ed4bdd4db8aad5c2a96afbd8a2b0f6ec
--- /dev/null
+++ b/lab0315/h
@@ -0,0 +1,222 @@
+    1  ls
+    2  who
+    3  passwd
+    4  ls
+    5  ls -l
+    6  ls -al
+    7  cp ~oss000/.bas* ~oss000/.profile  .
+    8  ls -al
+    9  exit
+   10  ls
+   11  touch file
+   12  ls
+   13  ls -l
+   14  touch file
+   15  ls -l
+   16  mkdir dirl
+   17  ls
+   18  ls -l
+   19  cd dirl
+   20  ls -al
+   21  ls -l
+   22  touch .file_hidden
+   23  ls -l
+   24  ls -al
+   25  cd ..
+   26  ls -al
+   27  pwd
+   28  cd
+   29  cd ..
+   30  ls
+   31  pwd
+   32  logout
+   33  pwd
+   34  ls
+   35  rm dirl
+   36  rm -r dirl
+   37  ls
+   38  mkdir dir1
+   39  ls
+   40  rmdir dir1
+   41  ls
+   42  cd ~
+   43  pwd
+   44  mkdir test
+   45  cd test
+   46  pwd
+   47  cd ~
+   48  rmdir test
+   49  ls
+   50  mkdir test
+   51  ls
+   52  cd test
+   53  touch .hidden_file
+   54  ls
+   55  ls -al
+   56  rm .hidden_file
+   57  ls -al
+   58  rmdir test
+   59  cd ~
+   60  rmdir test
+   61  ls
+   62  rm file
+   63  ls
+   64  touch file
+   65  ls
+   66  ls -al
+   67  vi file
+   68  ls -al
+   69  ls
+   70  vi file
+   71  rm file
+   72  ls
+   73  ls -al
+   74  touch file
+   75  ls
+   76  vi file
+   77  sudo swapoff - v /file
+   78  ls -al
+   79  rm .file.swp
+   80  ls -al
+   81  rm .file.swo
+   82  ls -al
+   83  vi file
+   84  ls -al
+   85  cat file
+   86  ls l
+   87  ls
+   88  cat .bashrc
+   89  ls -al
+   90  rm .file.swp
+   91  ls -al
+   92  vi file
+   93  mkdir dir
+   94  ch dir
+   95  cd dir
+   96  touch file 1 file 2 file3
+   97  ls -al
+   98  cd ~
+   99  ls
+  100  rmdir dir
+  101  rm -r dir
+  102  ls
+  103  mkdir dir
+  104  ls
+  105  cd dir
+  106  touch f1 f2 f3
+  107  ls
+  108  rm -i *
+  109  ls
+  110  rm f3
+  111  ls
+  112  cd ~
+  113  ls
+  114  man cd
+  115  man rm
+  116  rm --help
+  117  ls
+  118  rmdir dir
+  119  ls
+  120  ls -al
+  121  cat .bash_history 
+  122  ls
+  123  ls -al
+  124  ls -al .ba*
+  125  ls
+  126  rm file
+  127  ls
+  128  exit
+  129  logout
+  130  who
+  131  tty
+  132  who | wc
+  133  who | tail
+  134  who | sort
+  135  clear
+  136  cd
+  137  pwd
+  138  ls
+  139  mkdir foss
+  140  ls
+  141  cd foss
+  142  pwd
+  143  cd
+  144  pwd
+  145  cd ..
+  146  ls
+  147  cd oss000
+  148  cd
+  149  cd oss134
+  150  cd foss
+  151  cd
+  152  pwd
+  153  cd foss
+  154  echo "Sojin Han - 201920753" > studentid
+  155  ls -al
+  156  pwd
+  157  cd
+  158  pwd
+  159  exit
+  160  ls
+  161  touch text
+  162  ls
+  163  vi text
+  164  cat text
+  165  vi text
+  166  cattext
+  167  cat text
+  168  vi text
+  169  cat text
+  170  ls
+  171  rm text
+  172  ls
+  173  touch text
+  174  vi text
+  175  ls -al
+  176  rm text
+  177  ls -al
+  178  rm .text.swp
+  179  rm .text.swo
+  180  ls -al
+  181  touch text
+  182  ls
+  183  vi text
+  184  cat text
+  185  vi text
+  186  ls 0al
+  187  ls -al
+  188  rm text
+  189  ls
+  190  exit
+  191  cd foss
+  192  pwd
+  193  ls
+  194  cat studentid
+  195  cd /
+  196  ls
+  197  ls -al
+  198  cd /dev
+  199  ls -al
+  200  ls
+  201  ls -l
+  202  tty
+  203  cd /dev/pts
+  204  ls -l
+  205  tty
+  206  echo "Hi I am sojin" > /dev/pts/52
+  207  echo "Hi i am sojin" > /dev/pts/133
+  208  tty
+  209  chmod 777 /dev/pts/52
+  210  df 
+  211  cd
+  212  pwd
+  213  cd foss
+  214  ls -al
+  215  mkdir lab0315
+  216  ls
+  217  cd lab0315
+  218  ls -al
+  219  cd ..
+  220  cd lab0315/
+  221  history
+  222  history > h
diff --git a/lab0315/hello.c b/lab0315/hello.c
new file mode 100644
index 0000000000000000000000000000000000000000..3994d98f5f2aec643de6488196cb096c0a70d342
--- /dev/null
+++ b/lab0315/hello.c
@@ -0,0 +1,10 @@
+#include <stdio.h>
+int main(){
+
+	int a;
+	fscanf(stdin,"%d",&a);
+	fprintf(stdout,"hello stdout %d\n",a);
+	fprintf(stdout,"hello stderr %d\n",a+100);
+	return 0;
+}
+
diff --git a/lab0318-cp/file2 b/lab0318-cp/file2
new file mode 100644
index 0000000000000000000000000000000000000000..c87d0d40d49d765abcc6325975278c8bb33f53ef
--- /dev/null
+++ b/lab0318-cp/file2
@@ -0,0 +1,2 @@
+i am groot
+OIC
diff --git a/lab0318-cp/hfile1 b/lab0318-cp/hfile1
new file mode 100644
index 0000000000000000000000000000000000000000..abcc793642e7826cfbfd805d6d858c1cddaab99e
--- /dev/null
+++ b/lab0318-cp/hfile1
@@ -0,0 +1,3 @@
+hey
+11111111111
+222
diff --git a/lab0318-cp/hfile2 b/lab0318-cp/hfile2
new file mode 100644
index 0000000000000000000000000000000000000000..abcc793642e7826cfbfd805d6d858c1cddaab99e
--- /dev/null
+++ b/lab0318-cp/hfile2
@@ -0,0 +1,3 @@
+hey
+11111111111
+222
diff --git a/lab0318-cp/hfile2_h b/lab0318-cp/hfile2_h
new file mode 100644
index 0000000000000000000000000000000000000000..abcc793642e7826cfbfd805d6d858c1cddaab99e
--- /dev/null
+++ b/lab0318-cp/hfile2_h
@@ -0,0 +1,3 @@
+hey
+11111111111
+222
diff --git a/lab0318-cp/sfile1 b/lab0318-cp/sfile1
new file mode 120000
index 0000000000000000000000000000000000000000..30d67d4672d5c05833b7192cc77a79eaafb5c7ad
--- /dev/null
+++ b/lab0318-cp/sfile1
@@ -0,0 +1 @@
+file2
\ No newline at end of file
diff --git a/lab0318-cp/sfile2 b/lab0318-cp/sfile2
new file mode 120000
index 0000000000000000000000000000000000000000..ffbf7a2054a19d2deb0f5ea02b754577e6c561bb
--- /dev/null
+++ b/lab0318-cp/sfile2
@@ -0,0 +1 @@
+hfile1
\ No newline at end of file
diff --git a/lab0318-cp/sum b/lab0318-cp/sum
new file mode 100644
index 0000000000000000000000000000000000000000..bb89112b58166e52bbe7bf1a67be43d6cf0740a7
--- /dev/null
+++ b/lab0318-cp/sum
@@ -0,0 +1,2 @@
+hey
+hey
diff --git a/lab0318/file2 b/lab0318/file2
new file mode 100644
index 0000000000000000000000000000000000000000..c87d0d40d49d765abcc6325975278c8bb33f53ef
--- /dev/null
+++ b/lab0318/file2
@@ -0,0 +1,2 @@
+i am groot
+OIC
diff --git a/lab0318/hfile1 b/lab0318/hfile1
new file mode 100644
index 0000000000000000000000000000000000000000..abcc793642e7826cfbfd805d6d858c1cddaab99e
--- /dev/null
+++ b/lab0318/hfile1
@@ -0,0 +1,3 @@
+hey
+11111111111
+222
diff --git a/lab0318/hfile2 b/lab0318/hfile2
new file mode 100644
index 0000000000000000000000000000000000000000..abcc793642e7826cfbfd805d6d858c1cddaab99e
--- /dev/null
+++ b/lab0318/hfile2
@@ -0,0 +1,3 @@
+hey
+11111111111
+222
diff --git a/lab0318/hfile2_h b/lab0318/hfile2_h
new file mode 100644
index 0000000000000000000000000000000000000000..abcc793642e7826cfbfd805d6d858c1cddaab99e
--- /dev/null
+++ b/lab0318/hfile2_h
@@ -0,0 +1,3 @@
+hey
+11111111111
+222
diff --git a/lab0318/sfile1 b/lab0318/sfile1
new file mode 120000
index 0000000000000000000000000000000000000000..30d67d4672d5c05833b7192cc77a79eaafb5c7ad
--- /dev/null
+++ b/lab0318/sfile1
@@ -0,0 +1 @@
+file2
\ No newline at end of file
diff --git a/lab0318/sfile2 b/lab0318/sfile2
new file mode 120000
index 0000000000000000000000000000000000000000..ffbf7a2054a19d2deb0f5ea02b754577e6c561bb
--- /dev/null
+++ b/lab0318/sfile2
@@ -0,0 +1 @@
+hfile1
\ No newline at end of file
diff --git a/lab0318/sum b/lab0318/sum
new file mode 100644
index 0000000000000000000000000000000000000000..bb89112b58166e52bbe7bf1a67be43d6cf0740a7
--- /dev/null
+++ b/lab0318/sum
@@ -0,0 +1,2 @@
+hey
+hey
diff --git a/lab0322/a.err.result b/lab0322/a.err.result
new file mode 100644
index 0000000000000000000000000000000000000000..adcb41c6e2f719cbe9ce9dc142c046bc4b2dc193
--- /dev/null
+++ b/lab0322/a.err.result
@@ -0,0 +1 @@
+hello stderr 1100
diff --git a/lab0322/a.out b/lab0322/a.out
new file mode 100755
index 0000000000000000000000000000000000000000..bb944f509ca46c801a81a37559f0a21d75cb0437
Binary files /dev/null and b/lab0322/a.out differ
diff --git a/lab0322/a.result b/lab0322/a.result
new file mode 100644
index 0000000000000000000000000000000000000000..e16cb66eec3fdec65218cfbd7640c58dfe6684ee
--- /dev/null
+++ b/lab0322/a.result
@@ -0,0 +1 @@
+hello stdout 2008
diff --git a/lab0322/catout.txt b/lab0322/catout.txt
new file mode 100644
index 0000000000000000000000000000000000000000..4b1ddda79a29cd14369d65f969627b990854dd1a
--- /dev/null
+++ b/lab0322/catout.txt
@@ -0,0 +1,7 @@
+1
+2
+3
+4
+5
+525
+2008
diff --git a/lab0322/ff b/lab0322/ff
new file mode 100644
index 0000000000000000000000000000000000000000..c87d0d40d49d765abcc6325975278c8bb33f53ef
--- /dev/null
+++ b/lab0322/ff
@@ -0,0 +1,2 @@
+i am groot
+OIC
diff --git a/lab0322/hello.c b/lab0322/hello.c
new file mode 100644
index 0000000000000000000000000000000000000000..837c4ec1cb1fe23e451de46204d3d22f17621b6a
--- /dev/null
+++ b/lab0322/hello.c
@@ -0,0 +1,10 @@
+#include <stdio.h>
+int main(){
+
+	int a;
+	fscanf(stdin,"%d",&a);
+	fprintf(stdout,"hello stdout %d\n",a);
+	fprintf(stderr,"hello stderr %d\n",a+100);
+	return 0;
+}
+
diff --git a/lab0322/input-900 b/lab0322/input-900
new file mode 100644
index 0000000000000000000000000000000000000000..4b02a197f603b1424f13f8f5293cbf92417c1b00
--- /dev/null
+++ b/lab0322/input-900
@@ -0,0 +1 @@
+900
diff --git a/lab0322/inputfile b/lab0322/inputfile
new file mode 100644
index 0000000000000000000000000000000000000000..fc9ed6cfce1aefd8fbd9c46fee2829660f68ac2a
--- /dev/null
+++ b/lab0322/inputfile
@@ -0,0 +1,3 @@
+991011
+080525
+080525
diff --git a/lab0322/lsresult.txt b/lab0322/lsresult.txt
new file mode 100644
index 0000000000000000000000000000000000000000..f45b21153b8a2135c2da5c252af1425b50168658
--- /dev/null
+++ b/lab0322/lsresult.txt
@@ -0,0 +1,8 @@
+total 32
+-rwxr-xr-x 1 oss134 foss 8536  3월 22 12:09 a.out
+-rw-r--r-- 1 oss134 foss   15  3월 18 13:12 ff
+-rw-r--r-- 1 oss134 foss  162  3월 22 12:09 hello.c
+-rw-r--r-- 1 oss134 foss    6  3월 22 12:18 inputfile
+-rw-r--r-- 1 oss134 foss    0  3월 22 12:23 lsresult.txt
+-rw-r--r-- 1 oss134 foss   15  3월 18 13:11 sfile1
+-rw-r--r-- 1 oss134 foss   22  3월 18 13:03 std_id
diff --git a/lab0322/outputfile b/lab0322/outputfile
new file mode 100644
index 0000000000000000000000000000000000000000..fc9ed6cfce1aefd8fbd9c46fee2829660f68ac2a
--- /dev/null
+++ b/lab0322/outputfile
@@ -0,0 +1,3 @@
+991011
+080525
+080525
diff --git a/lab0322/result b/lab0322/result
new file mode 100644
index 0000000000000000000000000000000000000000..ff4a94ada3ab56d4ff45e66d5a8a03f052ce3abf
--- /dev/null
+++ b/lab0322/result
@@ -0,0 +1 @@
+hello stdout 1000
diff --git a/lab0322/sfile1 b/lab0322/sfile1
new file mode 100644
index 0000000000000000000000000000000000000000..c87d0d40d49d765abcc6325975278c8bb33f53ef
--- /dev/null
+++ b/lab0322/sfile1
@@ -0,0 +1,2 @@
+i am groot
+OIC
diff --git a/lab0322/std.txt b/lab0322/std.txt
new file mode 100644
index 0000000000000000000000000000000000000000..a9e076352423533f1102cf8b9f5fbec71a6b1980
--- /dev/null
+++ b/lab0322/std.txt
@@ -0,0 +1,2 @@
+hello stderr 2100
+hello stdout 2000
diff --git a/lab0322/std_id b/lab0322/std_id
new file mode 100644
index 0000000000000000000000000000000000000000..e80c74f90a020bcb2790423f243ab19e392928da
--- /dev/null
+++ b/lab0322/std_id
@@ -0,0 +1 @@
+Sojin Han - 201920753
diff --git a/lab0322/stderr.txt b/lab0322/stderr.txt
new file mode 100644
index 0000000000000000000000000000000000000000..809e35d02f5b91e805b72ab69377b5b7abe2241c
--- /dev/null
+++ b/lab0322/stderr.txt
@@ -0,0 +1 @@
+hello stderr 2100
diff --git a/lab0322/stdout.txt b/lab0322/stdout.txt
new file mode 100644
index 0000000000000000000000000000000000000000..b097c27d0c2034ebd78c6e3cc4a8f5291dd0ef5e
--- /dev/null
+++ b/lab0322/stdout.txt
@@ -0,0 +1 @@
+hello stdout 2000
diff --git a/lab0325/ans1 b/lab0325/ans1
new file mode 100644
index 0000000000000000000000000000000000000000..84872295ca8a8e0e7e42aadc154fe52b5dc8f21c
--- /dev/null
+++ b/lab0325/ans1
@@ -0,0 +1,4 @@
+
+
+drwx------ 2 oss134 foss 4096  3월 25 12:33 dir1
+
diff --git a/lab0329/a.out b/lab0329/a.out
new file mode 100755
index 0000000000000000000000000000000000000000..0e5ab852a4a1af34bb99f53a1502e214aedc9032
Binary files /dev/null and b/lab0329/a.out differ
diff --git a/lab0329/backup-lab0315.tar b/lab0329/backup-lab0315.tar
new file mode 100644
index 0000000000000000000000000000000000000000..5ed734e87799822d763b125397aac63884f818ac
Binary files /dev/null and b/lab0329/backup-lab0315.tar differ
diff --git a/lab0329/hello.c b/lab0329/hello.c
new file mode 100644
index 0000000000000000000000000000000000000000..300527611e8faca216cdec5e1db7587375fe4083
--- /dev/null
+++ b/lab0329/hello.c
@@ -0,0 +1,9 @@
+#include <stdio.h>
+
+int main(){
+	int a;
+	fscanf(stdin, "%d", &a);
+	fprintf(stdout, "hello stdout %d\n",a);
+	fprintf(stderr,"hello stderr %d\n",a+100);
+	return a;
+}
diff --git a/lab0329/lab0315/a.out b/lab0329/lab0315/a.out
new file mode 100755
index 0000000000000000000000000000000000000000..4a3ff4123116c320c20be31fe394a71a0288b13a
Binary files /dev/null and b/lab0329/lab0315/a.out differ
diff --git a/lab0329/lab0315/h b/lab0329/lab0315/h
new file mode 100644
index 0000000000000000000000000000000000000000..efb72267ed4bdd4db8aad5c2a96afbd8a2b0f6ec
--- /dev/null
+++ b/lab0329/lab0315/h
@@ -0,0 +1,222 @@
+    1  ls
+    2  who
+    3  passwd
+    4  ls
+    5  ls -l
+    6  ls -al
+    7  cp ~oss000/.bas* ~oss000/.profile  .
+    8  ls -al
+    9  exit
+   10  ls
+   11  touch file
+   12  ls
+   13  ls -l
+   14  touch file
+   15  ls -l
+   16  mkdir dirl
+   17  ls
+   18  ls -l
+   19  cd dirl
+   20  ls -al
+   21  ls -l
+   22  touch .file_hidden
+   23  ls -l
+   24  ls -al
+   25  cd ..
+   26  ls -al
+   27  pwd
+   28  cd
+   29  cd ..
+   30  ls
+   31  pwd
+   32  logout
+   33  pwd
+   34  ls
+   35  rm dirl
+   36  rm -r dirl
+   37  ls
+   38  mkdir dir1
+   39  ls
+   40  rmdir dir1
+   41  ls
+   42  cd ~
+   43  pwd
+   44  mkdir test
+   45  cd test
+   46  pwd
+   47  cd ~
+   48  rmdir test
+   49  ls
+   50  mkdir test
+   51  ls
+   52  cd test
+   53  touch .hidden_file
+   54  ls
+   55  ls -al
+   56  rm .hidden_file
+   57  ls -al
+   58  rmdir test
+   59  cd ~
+   60  rmdir test
+   61  ls
+   62  rm file
+   63  ls
+   64  touch file
+   65  ls
+   66  ls -al
+   67  vi file
+   68  ls -al
+   69  ls
+   70  vi file
+   71  rm file
+   72  ls
+   73  ls -al
+   74  touch file
+   75  ls
+   76  vi file
+   77  sudo swapoff - v /file
+   78  ls -al
+   79  rm .file.swp
+   80  ls -al
+   81  rm .file.swo
+   82  ls -al
+   83  vi file
+   84  ls -al
+   85  cat file
+   86  ls l
+   87  ls
+   88  cat .bashrc
+   89  ls -al
+   90  rm .file.swp
+   91  ls -al
+   92  vi file
+   93  mkdir dir
+   94  ch dir
+   95  cd dir
+   96  touch file 1 file 2 file3
+   97  ls -al
+   98  cd ~
+   99  ls
+  100  rmdir dir
+  101  rm -r dir
+  102  ls
+  103  mkdir dir
+  104  ls
+  105  cd dir
+  106  touch f1 f2 f3
+  107  ls
+  108  rm -i *
+  109  ls
+  110  rm f3
+  111  ls
+  112  cd ~
+  113  ls
+  114  man cd
+  115  man rm
+  116  rm --help
+  117  ls
+  118  rmdir dir
+  119  ls
+  120  ls -al
+  121  cat .bash_history 
+  122  ls
+  123  ls -al
+  124  ls -al .ba*
+  125  ls
+  126  rm file
+  127  ls
+  128  exit
+  129  logout
+  130  who
+  131  tty
+  132  who | wc
+  133  who | tail
+  134  who | sort
+  135  clear
+  136  cd
+  137  pwd
+  138  ls
+  139  mkdir foss
+  140  ls
+  141  cd foss
+  142  pwd
+  143  cd
+  144  pwd
+  145  cd ..
+  146  ls
+  147  cd oss000
+  148  cd
+  149  cd oss134
+  150  cd foss
+  151  cd
+  152  pwd
+  153  cd foss
+  154  echo "Sojin Han - 201920753" > studentid
+  155  ls -al
+  156  pwd
+  157  cd
+  158  pwd
+  159  exit
+  160  ls
+  161  touch text
+  162  ls
+  163  vi text
+  164  cat text
+  165  vi text
+  166  cattext
+  167  cat text
+  168  vi text
+  169  cat text
+  170  ls
+  171  rm text
+  172  ls
+  173  touch text
+  174  vi text
+  175  ls -al
+  176  rm text
+  177  ls -al
+  178  rm .text.swp
+  179  rm .text.swo
+  180  ls -al
+  181  touch text
+  182  ls
+  183  vi text
+  184  cat text
+  185  vi text
+  186  ls 0al
+  187  ls -al
+  188  rm text
+  189  ls
+  190  exit
+  191  cd foss
+  192  pwd
+  193  ls
+  194  cat studentid
+  195  cd /
+  196  ls
+  197  ls -al
+  198  cd /dev
+  199  ls -al
+  200  ls
+  201  ls -l
+  202  tty
+  203  cd /dev/pts
+  204  ls -l
+  205  tty
+  206  echo "Hi I am sojin" > /dev/pts/52
+  207  echo "Hi i am sojin" > /dev/pts/133
+  208  tty
+  209  chmod 777 /dev/pts/52
+  210  df 
+  211  cd
+  212  pwd
+  213  cd foss
+  214  ls -al
+  215  mkdir lab0315
+  216  ls
+  217  cd lab0315
+  218  ls -al
+  219  cd ..
+  220  cd lab0315/
+  221  history
+  222  history > h
diff --git a/lab0329/lab0315/hello.c b/lab0329/lab0315/hello.c
new file mode 100644
index 0000000000000000000000000000000000000000..3994d98f5f2aec643de6488196cb096c0a70d342
--- /dev/null
+++ b/lab0329/lab0315/hello.c
@@ -0,0 +1,10 @@
+#include <stdio.h>
+int main(){
+
+	int a;
+	fscanf(stdin,"%d",&a);
+	fprintf(stdout,"hello stdout %d\n",a);
+	fprintf(stdout,"hello stderr %d\n",a+100);
+	return 0;
+}
+
diff --git a/lab0329/test.ztar b/lab0329/test.ztar
new file mode 100644
index 0000000000000000000000000000000000000000..e30db3fdf9499e25e76df0153077a00c89caa6b8
Binary files /dev/null and b/lab0329/test.ztar differ
diff --git a/lab0401/a.out b/lab0401/a.out
new file mode 100755
index 0000000000000000000000000000000000000000..0e5ab852a4a1af34bb99f53a1502e214aedc9032
Binary files /dev/null and b/lab0401/a.out differ
diff --git a/lab0401/a.txt b/lab0401/a.txt
new file mode 100644
index 0000000000000000000000000000000000000000..9a115044c00963b538a6138fb3de81d65d4b8dbc
--- /dev/null
+++ b/lab0401/a.txt
@@ -0,0 +1 @@
+hello stdout 9
diff --git a/lab0401/b.out b/lab0401/b.out
new file mode 100755
index 0000000000000000000000000000000000000000..0e5ab852a4a1af34bb99f53a1502e214aedc9032
Binary files /dev/null and b/lab0401/b.out differ
diff --git a/lab0401/b.txt b/lab0401/b.txt
new file mode 100644
index 0000000000000000000000000000000000000000..0e173e64380d61ab57d979a6c3dbb8a280bcd3ce
--- /dev/null
+++ b/lab0401/b.txt
@@ -0,0 +1 @@
+hello stdout 99
diff --git a/lab0401/c.out b/lab0401/c.out
new file mode 100755
index 0000000000000000000000000000000000000000..0e5ab852a4a1af34bb99f53a1502e214aedc9032
Binary files /dev/null and b/lab0401/c.out differ
diff --git a/lab0401/hello.c b/lab0401/hello.c
new file mode 100644
index 0000000000000000000000000000000000000000..300527611e8faca216cdec5e1db7587375fe4083
--- /dev/null
+++ b/lab0401/hello.c
@@ -0,0 +1,9 @@
+#include <stdio.h>
+
+int main(){
+	int a;
+	fscanf(stdin, "%d", &a);
+	fprintf(stdout, "hello stdout %d\n",a);
+	fprintf(stderr,"hello stderr %d\n",a+100);
+	return a;
+}
diff --git a/lab0401/hist.end b/lab0401/hist.end
new file mode 100644
index 0000000000000000000000000000000000000000..1493f670c2bc382efdd49998bd892c2a9045a7b8
--- /dev/null
+++ b/lab0401/hist.end
@@ -0,0 +1,709 @@
+    1  ls
+    2  who
+    3  passwd
+    4  ls
+    5  ls -l
+    6  ls -al
+    7  cp ~oss000/.bas* ~oss000/.profile  .
+    8  ls -al
+    9  exit
+   10  ls
+   11  touch file
+   12  ls
+   13  ls -l
+   14  touch file
+   15  ls -l
+   16  mkdir dirl
+   17  ls
+   18  ls -l
+   19  cd dirl
+   20  ls -al
+   21  ls -l
+   22  touch .file_hidden
+   23  ls -l
+   24  ls -al
+   25  cd ..
+   26  ls -al
+   27  pwd
+   28  cd
+   29  cd ..
+   30  ls
+   31  pwd
+   32  logout
+   33  pwd
+   34  ls
+   35  rm dirl
+   36  rm -r dirl
+   37  ls
+   38  mkdir dir1
+   39  ls
+   40  rmdir dir1
+   41  ls
+   42  cd ~
+   43  pwd
+   44  mkdir test
+   45  cd test
+   46  pwd
+   47  cd ~
+   48  rmdir test
+   49  ls
+   50  mkdir test
+   51  ls
+   52  cd test
+   53  touch .hidden_file
+   54  ls
+   55  ls -al
+   56  rm .hidden_file
+   57  ls -al
+   58  rmdir test
+   59  cd ~
+   60  rmdir test
+   61  ls
+   62  rm file
+   63  ls
+   64  touch file
+   65  ls
+   66  ls -al
+   67  vi file
+   68  ls -al
+   69  ls
+   70  vi file
+   71  rm file
+   72  ls
+   73  ls -al
+   74  touch file
+   75  ls
+   76  vi file
+   77  sudo swapoff - v /file
+   78  ls -al
+   79  rm .file.swp
+   80  ls -al
+   81  rm .file.swo
+   82  ls -al
+   83  vi file
+   84  ls -al
+   85  cat file
+   86  ls l
+   87  ls
+   88  cat .bashrc
+   89  ls -al
+   90  rm .file.swp
+   91  ls -al
+   92  vi file
+   93  mkdir dir
+   94  ch dir
+   95  cd dir
+   96  touch file 1 file 2 file3
+   97  ls -al
+   98  cd ~
+   99  ls
+  100  rmdir dir
+  101  rm -r dir
+  102  ls
+  103  mkdir dir
+  104  ls
+  105  cd dir
+  106  touch f1 f2 f3
+  107  ls
+  108  rm -i *
+  109  ls
+  110  rm f3
+  111  ls
+  112  cd ~
+  113  ls
+  114  man cd
+  115  man rm
+  116  rm --help
+  117  ls
+  118  rmdir dir
+  119  ls
+  120  ls -al
+  121  cat .bash_history 
+  122  ls
+  123  ls -al
+  124  ls -al .ba*
+  125  ls
+  126  rm file
+  127  ls
+  128  exit
+  129  logout
+  130  who
+  131  tty
+  132  who | wc
+  133  who | tail
+  134  who | sort
+  135  clear
+  136  cd
+  137  pwd
+  138  ls
+  139  mkdir foss
+  140  ls
+  141  cd foss
+  142  pwd
+  143  cd
+  144  pwd
+  145  cd ..
+  146  ls
+  147  cd oss000
+  148  cd
+  149  cd oss134
+  150  cd foss
+  151  cd
+  152  pwd
+  153  cd foss
+  154  echo "Sojin Han - 201920753" > studentid
+  155  ls -al
+  156  pwd
+  157  cd
+  158  pwd
+  159  exit
+  160  ls
+  161  touch text
+  162  ls
+  163  vi text
+  164  cat text
+  165  vi text
+  166  cattext
+  167  cat text
+  168  vi text
+  169  cat text
+  170  ls
+  171  rm text
+  172  ls
+  173  touch text
+  174  vi text
+  175  ls -al
+  176  rm text
+  177  ls -al
+  178  rm .text.swp
+  179  rm .text.swo
+  180  ls -al
+  181  touch text
+  182  ls
+  183  vi text
+  184  cat text
+  185  vi text
+  186  ls 0al
+  187  ls -al
+  188  rm text
+  189  ls
+  190  exit
+  191  cd foss
+  192  pwd
+  193  ls
+  194  cat studentid
+  195  cd /
+  196  ls
+  197  ls -al
+  198  cd /dev
+  199  ls -al
+  200  ls
+  201  ls -l
+  202  tty
+  203  cd /dev/pts
+  204  ls -l
+  205  tty
+  206  echo "Hi I am sojin" > /dev/pts/52
+  207  echo "Hi i am sojin" > /dev/pts/133
+  208  tty
+  209  chmod 777 /dev/pts/52
+  210  df 
+  211  cd
+  212  pwd
+  213  cd foss
+  214  ls -al
+  215  mkdir lab0315
+  216  ls
+  217  cd lab0315
+  218  ls -al
+  219  cd ..
+  220  cd lab0315/
+  221  history
+  222  history > h
+  223  ls -al
+  224  cat h
+  225  vi hello.c
+  226  cat hello.c
+  227  ls -al
+  228  cc hello.c
+  229  ls -al
+  230  ./a.out
+  231  vi hello.c
+  232  cc hello.c
+  233  ls -al
+  234  a.out
+  235  ls
+  236  exit
+  237  pwd
+  238  tty
+  239  ls
+  240  ls foss
+  241  ls -l foss
+  242  ls -a foss
+  243  ls -al foss
+  244  man ls
+  245  cd foss
+  246  ls -al
+  247  mkdir lab0318
+  248  pwd
+  249  ls
+  250  cd lab0318
+  251  ..
+  252  touch file1
+  253  ls
+  254  date
+  255  ls -l
+  256  cp file1 file2
+  257  ls -al
+  258  cat file1
+  259  cat file3
+  260  vi file1
+  261  cat file1
+  262  ls -al
+  263  ln file1 hfile1
+  264  ls -al
+  265  vi hfile1
+  266  cat hfile1
+  267  cat file1 file2 hfile1
+  268  cat file1 hfile1 > sum
+  269  ls -al
+  270  cat sum
+  271  vi hfile1
+  272  ls -al
+  273  cat file1 hfile1
+  274  whoami
+  275  man whoami
+  276  more /etc/passwd
+  277  ls -i
+  278  ls -li
+  279  ls -il
+  280  ln file1 hfile2
+  281  ls -al
+  282  ln hfile2 hfile2_h
+  283  ls -al
+  284  ls -li
+  285  rm file1
+  286  ls -li
+  287  vi hfile2_h
+  288  ls -li
+  289  cat hfile1 hfile2_h
+  290  ln -s file2 sfile1
+  291  ls -al
+  292  vi file2
+  293  cat file2
+  294  ls -li
+  295  cat sfile1
+  296  cat file2 sfile1
+  297  ln -s hfile1 sfile2
+  298  ls -li
+  299  vi sfile1
+  300  cat sfile1 file2
+  301  cat sfile2
+  302  cd ..
+  303  mkdir lab0322
+  304  ls
+  305  cp studentid stdid
+  306  ls
+  307  ls -li
+  308  mv stdid std_id
+  309  ls
+  310  ls -ali
+  311  mv std_id lab0322
+  312  cd lab0322
+  313  ls
+  314  cp ../lab0318/sfile1 .
+  315  ls
+  316  ../lab0318/sfile1 ./sf
+  317  ls
+  318  cat sfile1
+  319  cp ../lab0318/file2 ./ff
+  320  ls
+  321  cat ff
+  322  cd
+  323  ls
+  324  cd foss
+  325  ls
+  326  cp lab0318 lab0318-cp
+  327  cp -r lab0318 lab0318-cp
+  328  ls
+  329  ls -ali
+  330  cd
+  331  exit
+  332  ls
+  333  cd foss
+  334  ls
+  335  cd 
+  336  history
+  337  tty
+  338  cd foss
+  339  ls
+  340  who
+  341  who | wc
+  342  ls
+  343  cd lab0322
+  344  ls
+  345  ls -al ../lab0315
+  346  cp ../lab0315/hello.c .
+  347  ls
+  348  cat hello.c
+  349  cc hello.c
+  350  ls
+  351  ./a.out
+  352  cat hello.c 
+  353  vi hello.c
+  354  cc hello.c
+  355  ./a.out
+  356  vi hello.c 
+  357  cat hello.c 
+  358  ./a.out
+  359  vi inputfile
+  360  cat inputfile
+  361  ./a.out <0 inputfile
+  362  ./a.out < inputfile
+  363  ./a.out <0 inputfile
+  364  ./a.out 0< inputfile
+  365  ls -l > lsresult.txt
+  366  ls
+  367  cat lsresult.txt
+  368  ./a.out > a.result
+  369  cat a.result
+  370  ./a.out 2> a.err.result
+  371  cat a.err.result
+  372  ./a.out 0< inputfile 1> stdout.txt 2> stderr.txt
+  373  ls -al
+  374  cat stdout.txt
+  375  cat stderr.txt
+  376  cat inputfile
+  377  ./a.out 0< inputfile 1> std.txt 2> std.txt
+  378  cat std.txt
+  379  ./a.out 0< inputfile >& std.txt
+  380  cat std.txt
+  381  ./a.out | wc
+  382  man tee
+  383  ./a.out | tee result
+  384  cat result
+  385  cat
+  386  cat > catout.txt
+  387  cat catout.txt
+  388  ls -al
+  389  more catout.txt
+  390  cat > inputfile
+  391  cat inputfile
+  392  cat >> inputfile
+  393  cat inputfile
+  394  cat <inputfile > outputfile
+  395  cat outputfile
+  396  exit
+  397  tty
+  398  ls
+  399  cd foss
+  400  ls
+  401  cd 
+  402  who | wc
+  403  who | sort
+  404  who | tail
+  405  who | sort | grep oss
+  406  who | grep hwan
+  407  grep babo
+  408  cd 
+  409  cd foss
+  410  ls
+  411  cd lab0322
+  412  ls
+  413  ls -al
+  414  ./a.out
+  415  echo "900"
+  416  echo 900 > input-900
+  417  ./a.out < input-900
+  418  ./a.out <<< 900
+  419  ./a.out <<< 902
+  420  cd ~oss000/foss/lab0322
+  421  ./a.out <<< 201920753
+  422  cd 
+  423  ls
+  424  cd foss
+  425  cd 
+  426  pwd
+  427  ls -al
+  428  cd foss
+  429  cd 
+  430  chmod 700 .
+  431  ls -al
+  432  cd 
+  433  cd foss
+  434  ls
+  435  mkdir lab0325
+  436  ls
+  437  cd lab0325
+  438  ls
+  439  mkdir dd1
+  440  ls -al
+  441  cd dd1
+  442  cd ..
+  443  ls
+  444  chmod a-x dd1
+  445  ls -al
+  446  echo "Test" > dd1/test
+  447  cd dd1
+  448  mv dd1 dir1
+  449  ls
+  450  ls -l dir1
+  451  ls -al
+  452  chmod 700 dir1
+  453  ls -al
+  454  cd ..
+  455  cd lab0325
+  456  ls  a-al
+  457  ls -al
+  458  cd dir1
+  459  cd ~oss000/foss/lab0325
+  460  touch oss134
+  461  cd 
+  462  ls
+  463  cd foss
+  464  ls
+  465  cd lab0325
+  466  ls
+  467  ls al
+  468  ls -al
+  469  touch oss134
+  470  ls
+  471  rm oss134
+  472  ls
+  473  cd dir1
+  474  cd ..
+  475  ls
+  476  chmod 700 .
+  477  ls -al
+  478  ps
+  479  ps -a
+  480  ls -al
+  481  chmod g-x .
+  482  chmod g-r .
+  483  ls -al
+  484  ps -l
+  485  chmod 777 .
+  486  ls -al
+  487  chmod 755 .
+  488  ls -al
+  489  ps -l
+  490  ps -ael | grep 12452
+  491  sleep 10
+  492  sleep 5 ; echo "5sec"
+  493  sleep 5000 &
+  494  ls -l
+  495  ps
+  496  sleep 6000 &
+  497  ps
+  498  kill 12021
+  499  ps
+  500  kill %1
+  501  ps
+  502  jobs
+  503  vi ans1
+  504  ls -al
+  505  fg
+  506  cat ans1
+  507  who | wc
+  508  exit
+  509  ls
+  510  who | wc
+  511  ls
+  512  cd foss
+  513  ls
+  514  mkdir lab0329
+  515  ls
+  516  cd lab0329
+  517  ls
+  518  ls -al
+  519  man tar
+  520  cd ..
+  521  ls
+  522  ls -al
+  523  tar -cvf lab0329/backup-0315.tar lab0315
+  524  ls -al lab0329
+  525  ls -al lab0329/backup-0315.tar
+  526  ls -al lab0315
+  527  ls -al lab0329
+  528  ls -al lab0329/backup-0315.tar
+  529  tar cvf lab0329/backup-lab0315.tar lab0315
+  530  cd lab0329
+  531  ls
+  532  rm backup-0315.tar
+  533  ls
+  534  tar cvf lab0329/backup-lab0315.tar lab0315
+  535  ls
+  536  ls -al
+  537  tar tvf backup-lab0315.tar 
+  538  ls -al
+  539  tar xvf  backup-lab0315.tar 
+  540  ls -al
+  541  du
+  542  ls -lh
+  543  du -h
+  544  ls -al
+  545  tar cvfz test.ztar lab0315
+  546  ls
+  547  ls -al
+  548  du -h
+  549  ls -al -h
+  550  man cd
+  551  cd --help
+  552  man ls
+  553  ls --help
+  554  cd --help
+  555  where is ls
+  556  whereis ls
+  557  whreis cd
+  558  whereis cd
+  559  ps
+  560  which bash
+  561  ls -l /bin/*shell
+  562  ls -l /bin/*sh
+  563  echo hi
+  564  echo -n Hi
+  565  echo -n "HI"
+  566  echo -n "HI" ; echo " hwanyong"
+  567  NAME=Sojin
+  568  echo NAME
+  569  echo $NAME
+  570  vi a.out
+  571  ls -al
+  572  ./a.out
+  573  chmod 755 a.out
+  574  ./a.out
+  575  cat a.out
+  576  vi a.out
+  577  echo $PATH
+  578  PATH="$PATH:."
+  579  echo $PATH
+  580  a.out
+  581  ls ; a.out ; sleep 1; echo "done"
+  582  a.out && ls
+  583  echo "1" && echo "2"
+  584  cp ../lab0315/hello.c
+  585  ls lab0315
+  586  cp ../lab0315/hello.c
+  587  ls lab0315
+  588  cp ../lab0315/hello.c
+  589  vi hello.c
+  590  cc hello.c
+  591  a.out
+  592  cat hello.c
+  593  ls -al
+  594  a.out
+  595  echo $?
+  596  a.out <<<0
+  597  a.out <<< 0 ; echo $?
+  598  echo $?
+  599  a.out <<<5; echo $?
+  600  py
+  601  python
+  602  a.out <<< 0 && a.out <<< 1
+  603  a.out <<<1 && a.out <<< 0
+  604  a.out <<<1 || a.out <<<0
+  605  a.out <<< 0 || a.out <<<1
+  606  exit
+  607  ls
+  608  cd foss
+  609  ls
+  610  cd ..
+  611  ls
+  612  man touch
+  613  cd foss
+  614  ls
+  615  mkdir lab0401
+  616  cd lab0401/
+  617  cd ..
+  618  cd foss
+  619  cd lab0401/
+  620  man shopt
+  621  shopt --help
+  622  shopt
+  623  shopt -s histverify
+  624  shopt
+  625  history
+  626  echo "0401 lab start"
+  627  cd
+  628  cd foss
+  629  mkdir lab0401 ; cd lab0401
+  630  history
+  631  history > hist.start
+  632  ls
+  633  ls -l
+  634  shopt -u histverify 
+  635  ls -l
+  636  shopt -s histverify 
+  637  shopt -u histverify 
+  638  ls -l
+  639  ls -l -a
+  640  cp ../lab0318
+  641  cp ../lab0329/hello.c ../lab0329/a.out .
+  642  ls -al
+  643  cc hello.c
+  644  a.out
+  645  ./a.out
+  646  ./a.out <<< 999
+  647  cp a.out b.out
+  648  ls -al
+  649  cc hello.c
+  650  ls -al
+  651  ./b.out <<< 100
+  652  cp -a b.out c.out
+  653  ls -al
+  654  ./b.ous <<< 100
+  655  ./b.out <<< 100
+  656  ./c.out <<< 100
+  657  ./a.out <<< 100
+  658  ./b.out <<< 100
+  659  history
+  660  ls -al
+  661  touch id > 201920753
+  662  ls
+  663  ls -al
+  664  history
+  665  100
+  666  ./a.out <<< 1999 1 2 3 4 5 6 7
+  667  2 3
+  668  2
+  669  cc hello.c
+  670  cc hello.c -o z.out
+  671  rm z.out
+  672  ls
+  673  ls -al
+  674  rm id
+  675  ls
+  676  rm 201920753
+  677  ls
+  678  cd ..
+  679  ls
+  680  cd lab0401
+  681  ls
+  682  if ((200>9)); then echo "200 is big"; else echo "9 is big"; fi
+  683  ls
+  684  *
+  685  history
+  686  echo *
+  687  ehco *out
+  688  echo *out
+  689  echo *u*
+  690  echo l*
+  691  echo a*
+  692  echo {a,b,c}.out
+  693  echo {a,b,c}.abcd
+  694  echo {a..z}.123
+  695  echo {1,,5}
+  696  echo {1.5}
+  697  mkdir temp
+  698  cd temp
+  699  touch {a..z}.cpp
+  700  ls
+  701  touch {0..999}.c
+  702  ls
+  703  rm {a..z}*
+  704  rm {1..999..2}.c
+  705  ls
+  706  cd ..
+  707  ./a.out <<< 9 > a.txt ; ./b.out <<< 99 > b.txt 
+  708  history
+  709  history > hist.end
diff --git a/lab0401/hist.start b/lab0401/hist.start
new file mode 100644
index 0000000000000000000000000000000000000000..ebc90664ad96c4f939086ec70dc0d2f82c3cacb0
--- /dev/null
+++ b/lab0401/hist.start
@@ -0,0 +1,631 @@
+    1  ls
+    2  who
+    3  passwd
+    4  ls
+    5  ls -l
+    6  ls -al
+    7  cp ~oss000/.bas* ~oss000/.profile  .
+    8  ls -al
+    9  exit
+   10  ls
+   11  touch file
+   12  ls
+   13  ls -l
+   14  touch file
+   15  ls -l
+   16  mkdir dirl
+   17  ls
+   18  ls -l
+   19  cd dirl
+   20  ls -al
+   21  ls -l
+   22  touch .file_hidden
+   23  ls -l
+   24  ls -al
+   25  cd ..
+   26  ls -al
+   27  pwd
+   28  cd
+   29  cd ..
+   30  ls
+   31  pwd
+   32  logout
+   33  pwd
+   34  ls
+   35  rm dirl
+   36  rm -r dirl
+   37  ls
+   38  mkdir dir1
+   39  ls
+   40  rmdir dir1
+   41  ls
+   42  cd ~
+   43  pwd
+   44  mkdir test
+   45  cd test
+   46  pwd
+   47  cd ~
+   48  rmdir test
+   49  ls
+   50  mkdir test
+   51  ls
+   52  cd test
+   53  touch .hidden_file
+   54  ls
+   55  ls -al
+   56  rm .hidden_file
+   57  ls -al
+   58  rmdir test
+   59  cd ~
+   60  rmdir test
+   61  ls
+   62  rm file
+   63  ls
+   64  touch file
+   65  ls
+   66  ls -al
+   67  vi file
+   68  ls -al
+   69  ls
+   70  vi file
+   71  rm file
+   72  ls
+   73  ls -al
+   74  touch file
+   75  ls
+   76  vi file
+   77  sudo swapoff - v /file
+   78  ls -al
+   79  rm .file.swp
+   80  ls -al
+   81  rm .file.swo
+   82  ls -al
+   83  vi file
+   84  ls -al
+   85  cat file
+   86  ls l
+   87  ls
+   88  cat .bashrc
+   89  ls -al
+   90  rm .file.swp
+   91  ls -al
+   92  vi file
+   93  mkdir dir
+   94  ch dir
+   95  cd dir
+   96  touch file 1 file 2 file3
+   97  ls -al
+   98  cd ~
+   99  ls
+  100  rmdir dir
+  101  rm -r dir
+  102  ls
+  103  mkdir dir
+  104  ls
+  105  cd dir
+  106  touch f1 f2 f3
+  107  ls
+  108  rm -i *
+  109  ls
+  110  rm f3
+  111  ls
+  112  cd ~
+  113  ls
+  114  man cd
+  115  man rm
+  116  rm --help
+  117  ls
+  118  rmdir dir
+  119  ls
+  120  ls -al
+  121  cat .bash_history 
+  122  ls
+  123  ls -al
+  124  ls -al .ba*
+  125  ls
+  126  rm file
+  127  ls
+  128  exit
+  129  logout
+  130  who
+  131  tty
+  132  who | wc
+  133  who | tail
+  134  who | sort
+  135  clear
+  136  cd
+  137  pwd
+  138  ls
+  139  mkdir foss
+  140  ls
+  141  cd foss
+  142  pwd
+  143  cd
+  144  pwd
+  145  cd ..
+  146  ls
+  147  cd oss000
+  148  cd
+  149  cd oss134
+  150  cd foss
+  151  cd
+  152  pwd
+  153  cd foss
+  154  echo "Sojin Han - 201920753" > studentid
+  155  ls -al
+  156  pwd
+  157  cd
+  158  pwd
+  159  exit
+  160  ls
+  161  touch text
+  162  ls
+  163  vi text
+  164  cat text
+  165  vi text
+  166  cattext
+  167  cat text
+  168  vi text
+  169  cat text
+  170  ls
+  171  rm text
+  172  ls
+  173  touch text
+  174  vi text
+  175  ls -al
+  176  rm text
+  177  ls -al
+  178  rm .text.swp
+  179  rm .text.swo
+  180  ls -al
+  181  touch text
+  182  ls
+  183  vi text
+  184  cat text
+  185  vi text
+  186  ls 0al
+  187  ls -al
+  188  rm text
+  189  ls
+  190  exit
+  191  cd foss
+  192  pwd
+  193  ls
+  194  cat studentid
+  195  cd /
+  196  ls
+  197  ls -al
+  198  cd /dev
+  199  ls -al
+  200  ls
+  201  ls -l
+  202  tty
+  203  cd /dev/pts
+  204  ls -l
+  205  tty
+  206  echo "Hi I am sojin" > /dev/pts/52
+  207  echo "Hi i am sojin" > /dev/pts/133
+  208  tty
+  209  chmod 777 /dev/pts/52
+  210  df 
+  211  cd
+  212  pwd
+  213  cd foss
+  214  ls -al
+  215  mkdir lab0315
+  216  ls
+  217  cd lab0315
+  218  ls -al
+  219  cd ..
+  220  cd lab0315/
+  221  history
+  222  history > h
+  223  ls -al
+  224  cat h
+  225  vi hello.c
+  226  cat hello.c
+  227  ls -al
+  228  cc hello.c
+  229  ls -al
+  230  ./a.out
+  231  vi hello.c
+  232  cc hello.c
+  233  ls -al
+  234  a.out
+  235  ls
+  236  exit
+  237  pwd
+  238  tty
+  239  ls
+  240  ls foss
+  241  ls -l foss
+  242  ls -a foss
+  243  ls -al foss
+  244  man ls
+  245  cd foss
+  246  ls -al
+  247  mkdir lab0318
+  248  pwd
+  249  ls
+  250  cd lab0318
+  251  ..
+  252  touch file1
+  253  ls
+  254  date
+  255  ls -l
+  256  cp file1 file2
+  257  ls -al
+  258  cat file1
+  259  cat file3
+  260  vi file1
+  261  cat file1
+  262  ls -al
+  263  ln file1 hfile1
+  264  ls -al
+  265  vi hfile1
+  266  cat hfile1
+  267  cat file1 file2 hfile1
+  268  cat file1 hfile1 > sum
+  269  ls -al
+  270  cat sum
+  271  vi hfile1
+  272  ls -al
+  273  cat file1 hfile1
+  274  whoami
+  275  man whoami
+  276  more /etc/passwd
+  277  ls -i
+  278  ls -li
+  279  ls -il
+  280  ln file1 hfile2
+  281  ls -al
+  282  ln hfile2 hfile2_h
+  283  ls -al
+  284  ls -li
+  285  rm file1
+  286  ls -li
+  287  vi hfile2_h
+  288  ls -li
+  289  cat hfile1 hfile2_h
+  290  ln -s file2 sfile1
+  291  ls -al
+  292  vi file2
+  293  cat file2
+  294  ls -li
+  295  cat sfile1
+  296  cat file2 sfile1
+  297  ln -s hfile1 sfile2
+  298  ls -li
+  299  vi sfile1
+  300  cat sfile1 file2
+  301  cat sfile2
+  302  cd ..
+  303  mkdir lab0322
+  304  ls
+  305  cp studentid stdid
+  306  ls
+  307  ls -li
+  308  mv stdid std_id
+  309  ls
+  310  ls -ali
+  311  mv std_id lab0322
+  312  cd lab0322
+  313  ls
+  314  cp ../lab0318/sfile1 .
+  315  ls
+  316  ../lab0318/sfile1 ./sf
+  317  ls
+  318  cat sfile1
+  319  cp ../lab0318/file2 ./ff
+  320  ls
+  321  cat ff
+  322  cd
+  323  ls
+  324  cd foss
+  325  ls
+  326  cp lab0318 lab0318-cp
+  327  cp -r lab0318 lab0318-cp
+  328  ls
+  329  ls -ali
+  330  cd
+  331  exit
+  332  ls
+  333  cd foss
+  334  ls
+  335  cd 
+  336  history
+  337  tty
+  338  cd foss
+  339  ls
+  340  who
+  341  who | wc
+  342  ls
+  343  cd lab0322
+  344  ls
+  345  ls -al ../lab0315
+  346  cp ../lab0315/hello.c .
+  347  ls
+  348  cat hello.c
+  349  cc hello.c
+  350  ls
+  351  ./a.out
+  352  cat hello.c 
+  353  vi hello.c
+  354  cc hello.c
+  355  ./a.out
+  356  vi hello.c 
+  357  cat hello.c 
+  358  ./a.out
+  359  vi inputfile
+  360  cat inputfile
+  361  ./a.out <0 inputfile
+  362  ./a.out < inputfile
+  363  ./a.out <0 inputfile
+  364  ./a.out 0< inputfile
+  365  ls -l > lsresult.txt
+  366  ls
+  367  cat lsresult.txt
+  368  ./a.out > a.result
+  369  cat a.result
+  370  ./a.out 2> a.err.result
+  371  cat a.err.result
+  372  ./a.out 0< inputfile 1> stdout.txt 2> stderr.txt
+  373  ls -al
+  374  cat stdout.txt
+  375  cat stderr.txt
+  376  cat inputfile
+  377  ./a.out 0< inputfile 1> std.txt 2> std.txt
+  378  cat std.txt
+  379  ./a.out 0< inputfile >& std.txt
+  380  cat std.txt
+  381  ./a.out | wc
+  382  man tee
+  383  ./a.out | tee result
+  384  cat result
+  385  cat
+  386  cat > catout.txt
+  387  cat catout.txt
+  388  ls -al
+  389  more catout.txt
+  390  cat > inputfile
+  391  cat inputfile
+  392  cat >> inputfile
+  393  cat inputfile
+  394  cat <inputfile > outputfile
+  395  cat outputfile
+  396  exit
+  397  tty
+  398  ls
+  399  cd foss
+  400  ls
+  401  cd 
+  402  who | wc
+  403  who | sort
+  404  who | tail
+  405  who | sort | grep oss
+  406  who | grep hwan
+  407  grep babo
+  408  cd 
+  409  cd foss
+  410  ls
+  411  cd lab0322
+  412  ls
+  413  ls -al
+  414  ./a.out
+  415  echo "900"
+  416  echo 900 > input-900
+  417  ./a.out < input-900
+  418  ./a.out <<< 900
+  419  ./a.out <<< 902
+  420  cd ~oss000/foss/lab0322
+  421  ./a.out <<< 201920753
+  422  cd 
+  423  ls
+  424  cd foss
+  425  cd 
+  426  pwd
+  427  ls -al
+  428  cd foss
+  429  cd 
+  430  chmod 700 .
+  431  ls -al
+  432  cd 
+  433  cd foss
+  434  ls
+  435  mkdir lab0325
+  436  ls
+  437  cd lab0325
+  438  ls
+  439  mkdir dd1
+  440  ls -al
+  441  cd dd1
+  442  cd ..
+  443  ls
+  444  chmod a-x dd1
+  445  ls -al
+  446  echo "Test" > dd1/test
+  447  cd dd1
+  448  mv dd1 dir1
+  449  ls
+  450  ls -l dir1
+  451  ls -al
+  452  chmod 700 dir1
+  453  ls -al
+  454  cd ..
+  455  cd lab0325
+  456  ls  a-al
+  457  ls -al
+  458  cd dir1
+  459  cd ~oss000/foss/lab0325
+  460  touch oss134
+  461  cd 
+  462  ls
+  463  cd foss
+  464  ls
+  465  cd lab0325
+  466  ls
+  467  ls al
+  468  ls -al
+  469  touch oss134
+  470  ls
+  471  rm oss134
+  472  ls
+  473  cd dir1
+  474  cd ..
+  475  ls
+  476  chmod 700 .
+  477  ls -al
+  478  ps
+  479  ps -a
+  480  ls -al
+  481  chmod g-x .
+  482  chmod g-r .
+  483  ls -al
+  484  ps -l
+  485  chmod 777 .
+  486  ls -al
+  487  chmod 755 .
+  488  ls -al
+  489  ps -l
+  490  ps -ael | grep 12452
+  491  sleep 10
+  492  sleep 5 ; echo "5sec"
+  493  sleep 5000 &
+  494  ls -l
+  495  ps
+  496  sleep 6000 &
+  497  ps
+  498  kill 12021
+  499  ps
+  500  kill %1
+  501  ps
+  502  jobs
+  503  vi ans1
+  504  ls -al
+  505  fg
+  506  cat ans1
+  507  who | wc
+  508  exit
+  509  ls
+  510  who | wc
+  511  ls
+  512  cd foss
+  513  ls
+  514  mkdir lab0329
+  515  ls
+  516  cd lab0329
+  517  ls
+  518  ls -al
+  519  man tar
+  520  cd ..
+  521  ls
+  522  ls -al
+  523  tar -cvf lab0329/backup-0315.tar lab0315
+  524  ls -al lab0329
+  525  ls -al lab0329/backup-0315.tar
+  526  ls -al lab0315
+  527  ls -al lab0329
+  528  ls -al lab0329/backup-0315.tar
+  529  tar cvf lab0329/backup-lab0315.tar lab0315
+  530  cd lab0329
+  531  ls
+  532  rm backup-0315.tar
+  533  ls
+  534  tar cvf lab0329/backup-lab0315.tar lab0315
+  535  ls
+  536  ls -al
+  537  tar tvf backup-lab0315.tar 
+  538  ls -al
+  539  tar xvf  backup-lab0315.tar 
+  540  ls -al
+  541  du
+  542  ls -lh
+  543  du -h
+  544  ls -al
+  545  tar cvfz test.ztar lab0315
+  546  ls
+  547  ls -al
+  548  du -h
+  549  ls -al -h
+  550  man cd
+  551  cd --help
+  552  man ls
+  553  ls --help
+  554  cd --help
+  555  where is ls
+  556  whereis ls
+  557  whreis cd
+  558  whereis cd
+  559  ps
+  560  which bash
+  561  ls -l /bin/*shell
+  562  ls -l /bin/*sh
+  563  echo hi
+  564  echo -n Hi
+  565  echo -n "HI"
+  566  echo -n "HI" ; echo " hwanyong"
+  567  NAME=Sojin
+  568  echo NAME
+  569  echo $NAME
+  570  vi a.out
+  571  ls -al
+  572  ./a.out
+  573  chmod 755 a.out
+  574  ./a.out
+  575  cat a.out
+  576  vi a.out
+  577  echo $PATH
+  578  PATH="$PATH:."
+  579  echo $PATH
+  580  a.out
+  581  ls ; a.out ; sleep 1; echo "done"
+  582  a.out && ls
+  583  echo "1" && echo "2"
+  584  cp ../lab0315/hello.c
+  585  ls lab0315
+  586  cp ../lab0315/hello.c
+  587  ls lab0315
+  588  cp ../lab0315/hello.c
+  589  vi hello.c
+  590  cc hello.c
+  591  a.out
+  592  cat hello.c
+  593  ls -al
+  594  a.out
+  595  echo $?
+  596  a.out <<<0
+  597  a.out <<< 0 ; echo $?
+  598  echo $?
+  599  a.out <<<5; echo $?
+  600  py
+  601  python
+  602  a.out <<< 0 && a.out <<< 1
+  603  a.out <<<1 && a.out <<< 0
+  604  a.out <<<1 || a.out <<<0
+  605  a.out <<< 0 || a.out <<<1
+  606  exit
+  607  ls
+  608  cd foss
+  609  ls
+  610  cd ..
+  611  ls
+  612  man touch
+  613  cd foss
+  614  ls
+  615  mkdir lab0401
+  616  cd lab0401/
+  617  cd ..
+  618  cd foss
+  619  cd lab0401/
+  620  man shopt
+  621  shopt --help
+  622  shopt
+  623  shopt -s histverify
+  624  shopt
+  625  history
+  626  echo "0401 lab start"
+  627  cd
+  628  cd foss
+  629  mkdir lab0401 ; cd lab0401
+  630  history
+  631  history > hist.start
diff --git a/lab0401/temp/0.c b/lab0401/temp/0.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/10.c b/lab0401/temp/10.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/100.c b/lab0401/temp/100.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/102.c b/lab0401/temp/102.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/104.c b/lab0401/temp/104.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/106.c b/lab0401/temp/106.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/108.c b/lab0401/temp/108.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/110.c b/lab0401/temp/110.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/112.c b/lab0401/temp/112.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/114.c b/lab0401/temp/114.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/116.c b/lab0401/temp/116.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/118.c b/lab0401/temp/118.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/12.c b/lab0401/temp/12.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/120.c b/lab0401/temp/120.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/122.c b/lab0401/temp/122.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/124.c b/lab0401/temp/124.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/126.c b/lab0401/temp/126.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/128.c b/lab0401/temp/128.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/130.c b/lab0401/temp/130.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/132.c b/lab0401/temp/132.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/134.c b/lab0401/temp/134.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/136.c b/lab0401/temp/136.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/138.c b/lab0401/temp/138.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/14.c b/lab0401/temp/14.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/140.c b/lab0401/temp/140.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/142.c b/lab0401/temp/142.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/144.c b/lab0401/temp/144.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/146.c b/lab0401/temp/146.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/148.c b/lab0401/temp/148.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/150.c b/lab0401/temp/150.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/152.c b/lab0401/temp/152.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/154.c b/lab0401/temp/154.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/156.c b/lab0401/temp/156.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/158.c b/lab0401/temp/158.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/16.c b/lab0401/temp/16.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/160.c b/lab0401/temp/160.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/162.c b/lab0401/temp/162.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
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index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/830.c b/lab0401/temp/830.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/832.c b/lab0401/temp/832.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/834.c b/lab0401/temp/834.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/836.c b/lab0401/temp/836.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/838.c b/lab0401/temp/838.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/84.c b/lab0401/temp/84.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/840.c b/lab0401/temp/840.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/842.c b/lab0401/temp/842.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/844.c b/lab0401/temp/844.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/846.c b/lab0401/temp/846.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/848.c b/lab0401/temp/848.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/850.c b/lab0401/temp/850.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/852.c b/lab0401/temp/852.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/854.c b/lab0401/temp/854.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/856.c b/lab0401/temp/856.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/858.c b/lab0401/temp/858.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/86.c b/lab0401/temp/86.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/860.c b/lab0401/temp/860.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/862.c b/lab0401/temp/862.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/864.c b/lab0401/temp/864.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/866.c b/lab0401/temp/866.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/868.c b/lab0401/temp/868.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/870.c b/lab0401/temp/870.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/872.c b/lab0401/temp/872.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/874.c b/lab0401/temp/874.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/876.c b/lab0401/temp/876.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/878.c b/lab0401/temp/878.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/88.c b/lab0401/temp/88.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/880.c b/lab0401/temp/880.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/882.c b/lab0401/temp/882.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/884.c b/lab0401/temp/884.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/886.c b/lab0401/temp/886.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/888.c b/lab0401/temp/888.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/890.c b/lab0401/temp/890.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/892.c b/lab0401/temp/892.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/894.c b/lab0401/temp/894.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/896.c b/lab0401/temp/896.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/898.c b/lab0401/temp/898.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/90.c b/lab0401/temp/90.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/900.c b/lab0401/temp/900.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/902.c b/lab0401/temp/902.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/904.c b/lab0401/temp/904.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/906.c b/lab0401/temp/906.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/908.c b/lab0401/temp/908.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/910.c b/lab0401/temp/910.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/912.c b/lab0401/temp/912.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/914.c b/lab0401/temp/914.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/916.c b/lab0401/temp/916.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/918.c b/lab0401/temp/918.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/92.c b/lab0401/temp/92.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/920.c b/lab0401/temp/920.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/922.c b/lab0401/temp/922.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/924.c b/lab0401/temp/924.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/926.c b/lab0401/temp/926.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/928.c b/lab0401/temp/928.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/930.c b/lab0401/temp/930.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/932.c b/lab0401/temp/932.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/934.c b/lab0401/temp/934.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/936.c b/lab0401/temp/936.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/938.c b/lab0401/temp/938.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/94.c b/lab0401/temp/94.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/940.c b/lab0401/temp/940.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/942.c b/lab0401/temp/942.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/944.c b/lab0401/temp/944.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/946.c b/lab0401/temp/946.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/948.c b/lab0401/temp/948.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/950.c b/lab0401/temp/950.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/952.c b/lab0401/temp/952.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/954.c b/lab0401/temp/954.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/956.c b/lab0401/temp/956.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/958.c b/lab0401/temp/958.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/96.c b/lab0401/temp/96.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/960.c b/lab0401/temp/960.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/962.c b/lab0401/temp/962.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/964.c b/lab0401/temp/964.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/966.c b/lab0401/temp/966.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/968.c b/lab0401/temp/968.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/970.c b/lab0401/temp/970.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/972.c b/lab0401/temp/972.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/974.c b/lab0401/temp/974.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/976.c b/lab0401/temp/976.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/978.c b/lab0401/temp/978.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/98.c b/lab0401/temp/98.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/980.c b/lab0401/temp/980.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/982.c b/lab0401/temp/982.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/984.c b/lab0401/temp/984.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/986.c b/lab0401/temp/986.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/988.c b/lab0401/temp/988.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/990.c b/lab0401/temp/990.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/992.c b/lab0401/temp/992.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/994.c b/lab0401/temp/994.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/996.c b/lab0401/temp/996.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0401/temp/998.c b/lab0401/temp/998.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0405/a b/lab0405/a
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0405/aa b/lab0405/aa
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0405/aaa b/lab0405/aaa
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0405/b b/lab0405/b
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0405/bb b/lab0405/bb
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0405/bbb b/lab0405/bbb
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0405/c b/lab0405/c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0405/cc b/lab0405/cc
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0405/ccc b/lab0405/ccc
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0405/infile b/lab0405/infile
new file mode 100644
index 0000000000000000000000000000000000000000..c536d3e936d5d8c87a97561b3be3fddd4bf3fe96
--- /dev/null
+++ b/lab0405/infile
@@ -0,0 +1 @@
+100 200 300 400 500
diff --git a/lab0405/sum.sh b/lab0405/sum.sh
new file mode 100644
index 0000000000000000000000000000000000000000..fc78b6d47bab3cd91d6134620cbe15aead23e03f
--- /dev/null
+++ b/lab0405/sum.sh
@@ -0,0 +1,8 @@
+
+cat infile | { while read a
+    do
+	    sum=$(($sum+$a))
+	    echo $sum
+    done
+    echo $sum
+    }
diff --git a/lab0408/a.out b/lab0408/a.out
new file mode 100755
index 0000000000000000000000000000000000000000..532fb19ec5aaee0221f5369ac6707b918f81b1c8
Binary files /dev/null and b/lab0408/a.out differ
diff --git a/lab0408/h b/lab0408/h
new file mode 100644
index 0000000000000000000000000000000000000000..efb72267ed4bdd4db8aad5c2a96afbd8a2b0f6ec
--- /dev/null
+++ b/lab0408/h
@@ -0,0 +1,222 @@
+    1  ls
+    2  who
+    3  passwd
+    4  ls
+    5  ls -l
+    6  ls -al
+    7  cp ~oss000/.bas* ~oss000/.profile  .
+    8  ls -al
+    9  exit
+   10  ls
+   11  touch file
+   12  ls
+   13  ls -l
+   14  touch file
+   15  ls -l
+   16  mkdir dirl
+   17  ls
+   18  ls -l
+   19  cd dirl
+   20  ls -al
+   21  ls -l
+   22  touch .file_hidden
+   23  ls -l
+   24  ls -al
+   25  cd ..
+   26  ls -al
+   27  pwd
+   28  cd
+   29  cd ..
+   30  ls
+   31  pwd
+   32  logout
+   33  pwd
+   34  ls
+   35  rm dirl
+   36  rm -r dirl
+   37  ls
+   38  mkdir dir1
+   39  ls
+   40  rmdir dir1
+   41  ls
+   42  cd ~
+   43  pwd
+   44  mkdir test
+   45  cd test
+   46  pwd
+   47  cd ~
+   48  rmdir test
+   49  ls
+   50  mkdir test
+   51  ls
+   52  cd test
+   53  touch .hidden_file
+   54  ls
+   55  ls -al
+   56  rm .hidden_file
+   57  ls -al
+   58  rmdir test
+   59  cd ~
+   60  rmdir test
+   61  ls
+   62  rm file
+   63  ls
+   64  touch file
+   65  ls
+   66  ls -al
+   67  vi file
+   68  ls -al
+   69  ls
+   70  vi file
+   71  rm file
+   72  ls
+   73  ls -al
+   74  touch file
+   75  ls
+   76  vi file
+   77  sudo swapoff - v /file
+   78  ls -al
+   79  rm .file.swp
+   80  ls -al
+   81  rm .file.swo
+   82  ls -al
+   83  vi file
+   84  ls -al
+   85  cat file
+   86  ls l
+   87  ls
+   88  cat .bashrc
+   89  ls -al
+   90  rm .file.swp
+   91  ls -al
+   92  vi file
+   93  mkdir dir
+   94  ch dir
+   95  cd dir
+   96  touch file 1 file 2 file3
+   97  ls -al
+   98  cd ~
+   99  ls
+  100  rmdir dir
+  101  rm -r dir
+  102  ls
+  103  mkdir dir
+  104  ls
+  105  cd dir
+  106  touch f1 f2 f3
+  107  ls
+  108  rm -i *
+  109  ls
+  110  rm f3
+  111  ls
+  112  cd ~
+  113  ls
+  114  man cd
+  115  man rm
+  116  rm --help
+  117  ls
+  118  rmdir dir
+  119  ls
+  120  ls -al
+  121  cat .bash_history 
+  122  ls
+  123  ls -al
+  124  ls -al .ba*
+  125  ls
+  126  rm file
+  127  ls
+  128  exit
+  129  logout
+  130  who
+  131  tty
+  132  who | wc
+  133  who | tail
+  134  who | sort
+  135  clear
+  136  cd
+  137  pwd
+  138  ls
+  139  mkdir foss
+  140  ls
+  141  cd foss
+  142  pwd
+  143  cd
+  144  pwd
+  145  cd ..
+  146  ls
+  147  cd oss000
+  148  cd
+  149  cd oss134
+  150  cd foss
+  151  cd
+  152  pwd
+  153  cd foss
+  154  echo "Sojin Han - 201920753" > studentid
+  155  ls -al
+  156  pwd
+  157  cd
+  158  pwd
+  159  exit
+  160  ls
+  161  touch text
+  162  ls
+  163  vi text
+  164  cat text
+  165  vi text
+  166  cattext
+  167  cat text
+  168  vi text
+  169  cat text
+  170  ls
+  171  rm text
+  172  ls
+  173  touch text
+  174  vi text
+  175  ls -al
+  176  rm text
+  177  ls -al
+  178  rm .text.swp
+  179  rm .text.swo
+  180  ls -al
+  181  touch text
+  182  ls
+  183  vi text
+  184  cat text
+  185  vi text
+  186  ls 0al
+  187  ls -al
+  188  rm text
+  189  ls
+  190  exit
+  191  cd foss
+  192  pwd
+  193  ls
+  194  cat studentid
+  195  cd /
+  196  ls
+  197  ls -al
+  198  cd /dev
+  199  ls -al
+  200  ls
+  201  ls -l
+  202  tty
+  203  cd /dev/pts
+  204  ls -l
+  205  tty
+  206  echo "Hi I am sojin" > /dev/pts/52
+  207  echo "Hi i am sojin" > /dev/pts/133
+  208  tty
+  209  chmod 777 /dev/pts/52
+  210  df 
+  211  cd
+  212  pwd
+  213  cd foss
+  214  ls -al
+  215  mkdir lab0315
+  216  ls
+  217  cd lab0315
+  218  ls -al
+  219  cd ..
+  220  cd lab0315/
+  221  history
+  222  history > h
diff --git a/lab0408/hello.c b/lab0408/hello.c
new file mode 100644
index 0000000000000000000000000000000000000000..e0cb1d95fc349ecd9f2f262d859d4ec592d35cc4
--- /dev/null
+++ b/lab0408/hello.c
@@ -0,0 +1,10 @@
+#include <stdio.h>
+int main(){
+
+	int a;
+	fscanf(stdin,"%d",&a);
+	fprintf(stdout,"hello stdout %d\n",a);
+	fprintf(stdout,"hello stderr %d\n",a+100);
+	return a;
+}
+
diff --git a/lab0408/hello.h b/lab0408/hello.h
new file mode 100644
index 0000000000000000000000000000000000000000..5cdb8ca096c8563d2c860fb232d2df4e922a8cd5
--- /dev/null
+++ b/lab0408/hello.h
@@ -0,0 +1 @@
+#define A 200
diff --git a/lab0408/test/.aaa b/lab0408/test/.aaa
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa1.c b/lab0408/test/aaa1.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa10.c b/lab0408/test/aaa10.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa100.c b/lab0408/test/aaa100.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa11.c b/lab0408/test/aaa11.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa12.c b/lab0408/test/aaa12.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa13.c b/lab0408/test/aaa13.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa14.c b/lab0408/test/aaa14.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa15.c b/lab0408/test/aaa15.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa16.c b/lab0408/test/aaa16.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa17.c b/lab0408/test/aaa17.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa18.c b/lab0408/test/aaa18.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa19.c b/lab0408/test/aaa19.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa2.c b/lab0408/test/aaa2.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa20.c b/lab0408/test/aaa20.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa21.c b/lab0408/test/aaa21.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa22.c b/lab0408/test/aaa22.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa23.c b/lab0408/test/aaa23.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa24.c b/lab0408/test/aaa24.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa25.c b/lab0408/test/aaa25.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa26.c b/lab0408/test/aaa26.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa27.c b/lab0408/test/aaa27.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa28.c b/lab0408/test/aaa28.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa29.c b/lab0408/test/aaa29.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa3.c b/lab0408/test/aaa3.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa30.c b/lab0408/test/aaa30.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa31.c b/lab0408/test/aaa31.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa32.c b/lab0408/test/aaa32.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa33.c b/lab0408/test/aaa33.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa34.c b/lab0408/test/aaa34.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa35.c b/lab0408/test/aaa35.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa36.c b/lab0408/test/aaa36.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa37.c b/lab0408/test/aaa37.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa38.c b/lab0408/test/aaa38.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa39.c b/lab0408/test/aaa39.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa4.c b/lab0408/test/aaa4.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa40.c b/lab0408/test/aaa40.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa41.c b/lab0408/test/aaa41.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa42.c b/lab0408/test/aaa42.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa43.c b/lab0408/test/aaa43.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa44.c b/lab0408/test/aaa44.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa45.c b/lab0408/test/aaa45.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa46.c b/lab0408/test/aaa46.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa47.c b/lab0408/test/aaa47.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa48.c b/lab0408/test/aaa48.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa49.c b/lab0408/test/aaa49.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa5.c b/lab0408/test/aaa5.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa50.c b/lab0408/test/aaa50.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa51.c b/lab0408/test/aaa51.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa52.c b/lab0408/test/aaa52.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa53.c b/lab0408/test/aaa53.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa54.c b/lab0408/test/aaa54.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa55.c b/lab0408/test/aaa55.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa56.c b/lab0408/test/aaa56.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa57.c b/lab0408/test/aaa57.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa58.c b/lab0408/test/aaa58.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa59.c b/lab0408/test/aaa59.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa6.c b/lab0408/test/aaa6.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa60.c b/lab0408/test/aaa60.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa61.c b/lab0408/test/aaa61.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa62.c b/lab0408/test/aaa62.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa63.c b/lab0408/test/aaa63.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa64.c b/lab0408/test/aaa64.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa65.c b/lab0408/test/aaa65.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa66.c b/lab0408/test/aaa66.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa67.c b/lab0408/test/aaa67.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa68.c b/lab0408/test/aaa68.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa69.c b/lab0408/test/aaa69.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa7.c b/lab0408/test/aaa7.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa70.c b/lab0408/test/aaa70.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa71.c b/lab0408/test/aaa71.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa72.c b/lab0408/test/aaa72.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa73.c b/lab0408/test/aaa73.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa74.c b/lab0408/test/aaa74.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa75.c b/lab0408/test/aaa75.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa76.c b/lab0408/test/aaa76.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa77.c b/lab0408/test/aaa77.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa78.c b/lab0408/test/aaa78.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa79.c b/lab0408/test/aaa79.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa8.c b/lab0408/test/aaa8.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa80.c b/lab0408/test/aaa80.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa81.c b/lab0408/test/aaa81.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa82.c b/lab0408/test/aaa82.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa83.c b/lab0408/test/aaa83.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa84.c b/lab0408/test/aaa84.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa85.c b/lab0408/test/aaa85.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa86.c b/lab0408/test/aaa86.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa87.c b/lab0408/test/aaa87.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa88.c b/lab0408/test/aaa88.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa89.c b/lab0408/test/aaa89.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa9.c b/lab0408/test/aaa9.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa90.c b/lab0408/test/aaa90.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa91.c b/lab0408/test/aaa91.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa92.c b/lab0408/test/aaa92.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa93.c b/lab0408/test/aaa93.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa94.c b/lab0408/test/aaa94.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa95.c b/lab0408/test/aaa95.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa96.c b/lab0408/test/aaa96.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa97.c b/lab0408/test/aaa97.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa98.c b/lab0408/test/aaa98.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/aaa99.c b/lab0408/test/aaa99.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0408/test/fc.sh b/lab0408/test/fc.sh
new file mode 100755
index 0000000000000000000000000000000000000000..0adf251fe366d2cbaf4b07c7147fbf6c4f9236b3
--- /dev/null
+++ b/lab0408/test/fc.sh
@@ -0,0 +1,11 @@
+#/bin/bash
+for i in {1..100} 
+do
+	touch aaa${i}.c
+done
+
+for i in aaa5?.c
+do
+	echo mv $i ${i%c}java
+done
+
diff --git a/lab0408/today b/lab0408/today
new file mode 100644
index 0000000000000000000000000000000000000000..59fcf3cf93d1a5d725d31e083e132cda87acf042
--- /dev/null
+++ b/lab0408/today
@@ -0,0 +1 @@
+20220408
diff --git a/lab0412/aaaa0000.c b/lab0412/aaaa0000.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0412/aaaa0001.c b/lab0412/aaaa0001.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0412/aaaa0002.c b/lab0412/aaaa0002.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0412/aaaa0003.c b/lab0412/aaaa0003.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0412/aaaa0004.c b/lab0412/aaaa0004.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0412/aaaa0005.c b/lab0412/aaaa0005.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0412/aaaa0006.c b/lab0412/aaaa0006.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0412/aaaa0007.c b/lab0412/aaaa0007.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0412/aaaa0008.c b/lab0412/aaaa0008.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0412/aaaa0009.c b/lab0412/aaaa0009.c
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0412/file0000.sh b/lab0412/file0000.sh
new file mode 100644
index 0000000000000000000000000000000000000000..018ee320f97513f2a54b4715b9c7d90527134857
--- /dev/null
+++ b/lab0412/file0000.sh
@@ -0,0 +1,7 @@
+#/bin/bash
+
+for i in {0..9}
+do
+	touch `printf "aaaa%04d.c\n" $i`
+done
+
diff --git a/lab0412/filename b/lab0412/filename
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0412/filename2 b/lab0412/filename2
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0412/files b/lab0412/files
new file mode 100644
index 0000000000000000000000000000000000000000..75d8abaa4a6a086ef3743eea079ba38a6ab9a498
--- /dev/null
+++ b/lab0412/files
@@ -0,0 +1,18 @@
+aaaa0000.c
+aaaa0001.c
+aaaa0002.c
+aaaa0003.c
+aaaa0004.c
+aaaa0005.c
+aaaa0006.c
+aaaa0007.c
+aaaa0008.c
+aaaa0009.c
+file0000.sh
+filename
+filename2
+files
+sum1.sh
+sum2.sh
+sum3.sh
+sum.sh
diff --git a/lab0412/sum.sh b/lab0412/sum.sh
new file mode 100644
index 0000000000000000000000000000000000000000..f1e63624777bbe2d0c36019b8c1bdf96b4e579a5
--- /dev/null
+++ b/lab0412/sum.sh
@@ -0,0 +1,9 @@
+#/bin/bash
+sum=0
+end=10000
+
+echo $0 $1 $2 $3
+for (( i=0 ; i<(($end)) ; i++ )) ; do
+	sum=$(($sum+$i))
+done
+echo $sum
diff --git a/lab0412/sum1.sh b/lab0412/sum1.sh
new file mode 100644
index 0000000000000000000000000000000000000000..f1e63624777bbe2d0c36019b8c1bdf96b4e579a5
--- /dev/null
+++ b/lab0412/sum1.sh
@@ -0,0 +1,9 @@
+#/bin/bash
+sum=0
+end=10000
+
+echo $0 $1 $2 $3
+for (( i=0 ; i<(($end)) ; i++ )) ; do
+	sum=$(($sum+$i))
+done
+echo $sum
diff --git a/lab0412/sum2.sh b/lab0412/sum2.sh
new file mode 100644
index 0000000000000000000000000000000000000000..f1e63624777bbe2d0c36019b8c1bdf96b4e579a5
--- /dev/null
+++ b/lab0412/sum2.sh
@@ -0,0 +1,9 @@
+#/bin/bash
+sum=0
+end=10000
+
+echo $0 $1 $2 $3
+for (( i=0 ; i<(($end)) ; i++ )) ; do
+	sum=$(($sum+$i))
+done
+echo $sum
diff --git a/lab0412/sum3.sh b/lab0412/sum3.sh
new file mode 120000
index 0000000000000000000000000000000000000000..2ebde5ac9a63c136d5a8f7892a572da8d8a785f3
--- /dev/null
+++ b/lab0412/sum3.sh
@@ -0,0 +1 @@
+sum.sh
\ No newline at end of file
diff --git a/lab0412/test.out b/lab0412/test.out
new file mode 100644
index 0000000000000000000000000000000000000000..7d72d940fa0dd0e8b0d57d92560955861cccf295
--- /dev/null
+++ b/lab0412/test.out
@@ -0,0 +1,19 @@
+aaaa0000.c
+aaaa0001.c
+aaaa0002.c
+aaaa0003.c
+aaaa0004.c
+aaaa0005.c
+aaaa0006.c
+aaaa0007.c
+aaaa0008.c
+aaaa0009.c
+file0000.sh
+filename
+filename2
+files
+sum1.sh
+sum2.sh
+sum3.sh
+sum.sh
+test.out
diff --git a/lab0415/aaa b/lab0415/aaa
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/lab0415/bbb b/lab0415/bbb
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/studentid b/studentid
new file mode 100644
index 0000000000000000000000000000000000000000..e80c74f90a020bcb2790423f243ab19e392928da
--- /dev/null
+++ b/studentid
@@ -0,0 +1 @@
+Sojin Han - 201920753