RCS - Revision Control System. Everyone should use this.

Do you edit /etc files or .inis or .confs? If you're like me, you have tons of .old or .mmddyy or .1, .2, etc. files cluttering up your directory.

If you're further like me, you have trouble sometimes to determine which one of the filename.ext~ or filename.old or filename.old.2 that you'd need to go back to if you screw something up.

RCS helps this lots.



http://galton.uchicago.edu/~gosset/Compdocs/rcs.html