168  cd cse374;ls -l
  169  emacs * &
  170  open mtn.jpg 
  171  display mtn.jpg 
  172  display thumb.jpg 
  173  ./make_thumbnail1 mtn.jpg tiny.jpg
  174  ls -l
  175  open tiny.jpg 
  176  display tiny.jpg 
  177  ./make_thumbnail1
  178  source make_thumbnail1
  179  ./make_thumbnail2 hi there - how's everyone?
  180  ./make_thumbnail2 hi there cse374
  181  ./make_thumbnail2 mtn.jpg small.jpg
  182  ls -l
  183  cat
  184  cat < hello
  185  echo $x
  186  x=1
  187  echo $x
  188  y=2
  189  z=x+y
  190  z
  191  echo $z
  192  z=$x+$y
  193  echo $z
  194  ((z=$x+$y))
  195  echo $z
  196  echo $x
  197  echo $xyz
  198  echo ${x}yz
  199  set
  200  printenv
  201  echo $PATH
  202  echo $HOME
  203  echo $USER
  204  echo $PS1
  205  PS1="? "
  206  PS1="ya whadda ya want? "
  207  ls
  208  PS1="Yes, master, what is thy command? "
  209  PS1="> "
  210  bash
  211  for w in hi there everyone; do echo $w; done
  212  ls
  213  emacs * &
  214  ./countdown 
  215  ./countdown one II trie quatro cinq
  216  shift
  217  ls
  218  ./makeNFiles 3 xyzzy
  219  ls -l
  220  ls
  221  make 42 answer
  222  ./makeNFiles 42 answer
  223  ls
  224  history >lec5.history