Mastering Regular Expressions, Jeffery E. F. Friedl, O'Reilly, ISBN 1-56592-257-3.

Learning the bash Shell, 2nd Edition, Cameron Newham and Bill Rosenblatt, O'Reilly, ISBN 1-56592-347-2.

UNIX Power Tools, 2nd Edition, Jerry Peek, Tim O'Reilly and Mike Loukides, O'Reilly, ISBN 1-56592-260-3.

All listings referred to in this article are available by anonymous download in the file