Upload changes to the repository

cvs commit [filenames]

Force upload of unchanged files

cvs commit -f [filenames]

Download changes from the repository

cvs update [filenames]

Download changes, and download new directories

cvs update -d [filenames]

Download changes, but not empty directories

cvs update -P [filenames]

Download changes and clear sticky revision, date, keyword mode, or branch

cvs update -A [filenames]

Convert an existing sandbox to a specific tag name or revision

cvs update -r [tagname|revision] 
project

Convert an existing sandbox to a specific date or time

cvs update -D [date|time] project