(C) 2003, Tim Maher       1-20       www.TeachMePerl.com
The Sed Command
(not as famous as grep)

sed
main text processing command of early UNIX
AWK replaced it in 1977 for most uses
performs (non-interactive) editing of text
      $ date | sed 's/Sat/Saturday/'
      Saturday Apr 19 15:14:52 PDT 2003
      $