http://www.computerhope.com/unix/used.htm sed sed http://www.computerhope.com/unix/used.htm sed http://www.computerhope.com/unix/used.htm http://www.computerhope.com/unix/used.htm http://www.computerhope.com/unix/used.htm http://www.computerhope.com/unix/used.htm sed http://www.computerhope.com/unix/used.htm