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Document Revision History

This table describes the changes to Shell Scripting Primer.

Date	Notes
2008-04-08	Fixed a bug in an awk code sample.
2008-02-08	Added several useful commands to the "Other Tools" chapter.
2007-12-11	Updated for Mac OS X v10.5. Added some basic information about csh and additional awk samples.
2007-10-02	Fixed a typo in an awk code example.
2007-04-03	Added chapter on performance optimization and advanced scripting techniques. Made other minor enhancements.
2006-12-05	Clarified behavior of variable exports. Added explanation of eval command.
2006-11-07	Added chapters on cross-platform scripting and awk.
2006-10-03	Added a section on job control in bash and zsh.
2006-06-28	Fixed a number of typographical errors.
2006-05-23	First version.

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