1  clear
    2  echo 1 2 3 4 > testing
    3  ls
    4  echo yummy > tasting
    5  echo chirp > tweet
    6  touch two
    7  mkdir docs
    8  ls
    9  cat * > 'short story'
   10  more short\ story 
   11  echo t*
   12  echo s*
   13  echo t* docs
   14  echo s* t*
   15  echo [st]*
   16  echo t[a-g]*
   17  echo t?sting
   18  man grep
   19  ln -s /usr/share/dict/words
   20  ls
   21  more words
   22  wc words 
   23  grep 'director' words
   24  grep '^director' words
   25  grep '^director$' words
   26  grep 'director$' words
   27  grep -c 'director' words
   28  grep 'director' words | wc
   29  grep '^[a]*' words
   30  grep '[a]' words
   31  grep 'a\+' words
   32  grep 'qu.*ing' words
   33  grep '^qu.*ing' words
   34  grep '^qu...ing' words
   35  grep '^qu...ing$' words
   36* grep 'qu...ing' words
   37  echo other the them > testfile
   38  more testfile 
   39  grep 'the' testfile
   40  grep '\<the\>' testfile
   41  grep '\(the\)\+' testfile
   42  echo thethe >> testfile
   43  grep '\(the\)\+' testfile
   44  grep '^a\|A' words
   45  grep '^a\|A' words | head
   46  grep '^(a\|A)' words
   47  grep '^\(a\|A\)' words
   48  grep '^[aA]' words
   49  grep '^[^a-g,i-z,A-Z]' words
   50  grep '^[^a-g,i-z,A-Z]' words |head
   51  grep '^\([A-Za-z]\)\1$' words
   52  grep '^\([A-Za-z]\)\1\1$' words
   53  grep '^\([A-Za-z]\)\1\1\1$' words
   54  grep'^\([A-Za-z]*\)\1$' words
   55  grep '^\([A-Za-z]*\)\1$' words
   56  grep '^\(.\)\(.\)\(.)\\3\2\1$' words
   57  grep '^\(.\)\(.\)\(.\)\\3\2\1$' words
   58  grep '^\(.\)\(.\)\(.\)\3\2\1$' words
   59  ll
   60  wget https://courses.cs.washington.edu/courses/cse374/19sp/numberslist
   61  wget https://courses.cs.washington.edu/courses/cse374/19sp/lectures/numberslist
   62  ls
   63  more numberslist 
   64  wc numberslist 
   65  grep '([0-9]*)' numberslist 
   66  history > lecture6history