mkdir RCS ci -u file.pl # check in file (inital touched version) co -l file.pl # check out file to make revisions .... rlog file.pl # history of a file rcsdiff -r1.2 file.pl # diff versions of files co -r1.2 file.pl # get an earlier version of a file #### my $v = q{$Id$}; print "$v\n"; or simply # $Id$ #### rlog file.pl # display a log history of the file changes from version to version...