CVS FAQ

type or copy paste (ctrl+shift+v to console)
cvs -d:pserver:anonymous@cvs.sourceforge.net:/cvsroot/tikiwiki login
hit return
cvs -z3 -d:pserver:anonymous@cvs.sourceforge.net:/cvsroot/tikiwiki co tikiwiki
The -z is for Zip compression
The -d is for Directory
co is checkout

cvs -nq update
Attempt to execute the cvs_command, but only to issue reports; do it quietly. update changes your working directory but not the depository.