Hi.
For installation, I suggest the package manager of your distribution,
rpm,
apt-get,
yast, etc.
For use, another source is:
http://cvsbook.red-bean.com/, also available in book form.
Note that many developers have shifted from
cvs to subversion, about which you can read more at:
http://subversion.tigris.org/.
Best wishes ... cheers, makyo