Input/Output Redirection

You can direct input/output from/to files as well:

    > filename -- direct stdout to filename (truncates it!)
   >> filename -- append stdout to filename
    < filename -- read input from filename
Example

  $ wc -l /etc/group
  57 /etc/group

  $ wc -l < /etc/group
  57

  $ sort words.txt > words-sorted.txt