Exempt files from version control

[Jan-Georg Smaus]

Hi,

how can I tell cvs to leave a file alone, i.e., to ignore it in
"cvs update" and "cvs commit" commands? That is to say, I got the file 
from the Repository using "cvs update", I customized the file for my 
purposes, and now I want to keep this personal version of the file. I 
don't want the rest of the world to notice my changes, and I don't want 
my file to be modified anymore by the rest of the world.

I was thinking that the .cvsignore file would help here, but it seems 
like its job is a different one.

Can anyone help?

Best regards,
Jan Smaus