$ cvs -v

Concurrent Versions System (CVS) 1.11.2 (client/server)

Copyright (c) 1989-2001 Brian Berliner, david d `zoo' zuhn,
                        Jeff Polk, and other authors

CVS may be copied only under the terms of the GNU General Public License,
a copy of which can be found with the CVS distribution kit.

Specify the --help option for further information about CVS