291  mkdir test_rights
  292  cd test_rights/
  293  clear
  294  echo Hello >file1.txt
  295  echo Hello >file2.txt
  296  echo Hello >file3.txt
  297  ls
  298  ls -l
  299  ls -al
  300  chmod 753 file1.txt 
  301  ls -al
  302  chmod 702 file2.txt 
  303  ls -l
  304  cat file3.txt 
  305  chmod 000 file3.txt 
  306  cat file3.txt 
  307  ls -l
  308  chmod 750 file3.txt 
  309  cat file3.txt 
  310  ls -l
  311  echo Thomas >>file3.txt 
  312  chmod 400 file3.txt 
  313  echo Thomas >>file3.txt 
  314  clear
  315  vi ls.sh
  316  ls.sh
  317  chmod 700 ls.sh 
  318  ls.sh
  319  ./ls.sh
  320  chmod 600 ls.sh 
  321  ./ls.sh
  322  clear
  323  ls -l
  324  mkdir dir1
  325  mkdir dir2
  326  ls -l
  327  mkdir dir3
  328  clear
  329  ls -l
  330  chmod 700 dir1
  331  chmod 500 dir2
  332  chmod 000 dir3
  333  ls -l
  334  cp file3.txt dir1
  335  ls dir1
  336  rm dir1/file3.txt 
  337  cp file3.txt dir2
  338  ls dir2
  339  ls -al dir2
  340  cp file3.txt dir3
  341  ls -al dir3
  342  clear
  343  ls -l
  344  cd ..
  345  clear

