# some typos deleted (thus the missing numbers)

    1  echo abcdef
    2  echo abcdef | grep bcd
    3  echo abcdef | grep xyz
    4  ls -l
    5  cat names
    7  grep Mouse names
    8  grep M* names
    9  grep n* names
   10  echo n* names
   11  echo 'n*' names
   12  grep 'n*' names
   13  alias grep
   14  grep 'Mouse*' names
   15  grep '(Mouse)*' names
   16  grep '[Mouse]*' names
   17  grep '[Mouse]' names
   18  grep 'Mouse' names
   19  grep '^Mouse' names
   20  grep '^Mouse$' names
   21  emacs &
   22  egrep '(Mouse)' names
   23  egrep '(Mouse)*' names
   24  ls /usr/share/dict/
   25  ls -l /usr/share/dict/
   26  ln -s /usr/share/dict/words 
   27  ls -l
   28  more words 
   29  grep 'twig' words |more
   30  grep '^twig' words |more
   31  grep 'twig$' words 
   32  grep '^tw.*ig$' words|more
   33  grep '^qu...ing$' words|more
   34  grep '^qu........ing$' words|more
   35  grep '^qu.*ing$' words|more
   36  grep '^qu.*ing$' words|wc
   37  grep '^qu*ing$' words
   38  grep '^qu.*i*ng$' words|more
   39  grep '\(xy\).*\1' words|more
   40  grep '\([aeiou]\).*\1.*\1.*\1' words |more
   41  grep '\([aeiou]\).*\1.*\1.*\1.*\1' words |more
   42  grep '\([aeiou]\).*\1.*\1.*\1.*\1.*\1' words |more
   43  grep Hamlet hamlet.txt|more
   44  sed -e 's/Hamlet/Fred/g' hamlet.txt | grep Fred|more
   45  cat names 
   47  cat names | sort
   48  cat names
   49  sed -e 's/\(.*\), \(.*\)/\2 \1/' names 
   50  sed -e 's/\(.*\), \(.*\)/\2 \1/' names |sort
   51  sort names | sed -e 's/\(.*\), \(.*\)/\2 \1/'
   52  history >lec6.history