351  ls
  352  ls -a
  353  ls -l
  354  man chmod
  355  ls -l
  356  chmod ugo+rwx foo
  357  ls -l
  358  chmod a-rwx foo
  359  ls -l
  360  chmod u+rw foo
  361* ls 
  362  chmod go+r foo
  363  chmod go+w *
  364  ls -l
  365  chmod go-w *
  366  lsl -l
  367  ls -l
  368  emacs
  369  jobs
  370  bg
  371  ls
  372  lobs
  373  jobs
  374  ls &
  375  fg
  376  bg
  377  ps
  378  top
  379  ls
  380  jobs
  381  ls
  382  ls -l
  383  chmod u-r foo
  384  ls -l
  385  cat foo
  386  chmod u-r foo
  387  type cd
  388  type ls
  389  type jobs
  390  type kill
  391  type top
  392  which ls
  393  echo Hi
  394  echo *
  395  echo ~
  396  echo ~justine
  397  ls
  398  echo f*
  399  echo *f*
  400  echo .*
  401  echo f??
  402  echo f?
  403  echo f[a-z]o
  404  echo f[abc]o
  405  echo f[abco]o
  406  echo f??
  407  echo "f??"
  408  echo f[abco]o
  409  echo f[^abco]o
  410  echo f[^abc]o
  411  history
  412  echo f[^abc]o
  413  echo f[^abc]o
  414  type ls
  415  alias ll="ls -l"
  416  type ll
  417  ll
  418  ls
  419  touch foo.txt
  420  touch foo.swf
  421  touch foo.doc
  422  ls foo*
  423  echo *{swf,txt}
  424  history >lecture2history.txt