Open the program Terminal (a new shell window should appear on your screen)
Change the directory to the local text repository folder. Type: cd desktop/sources and press enter
Adjust the network protocol. Type: export CVS_RSH=ssh and press enter
Type: cvs -d :ext:username@archimedes.mpiwg-berlin.mpg.de:/archimedes/cvsroot commit texts/archimedes/xml
Type in your password and press enter
Press i (=insert) to add a comment, what you have done with the files (!very important!)
Press esc after the completion of your comment and type: :wq (=write and quit)
The changed files will be uploaded into the permanent text repository