How to limit file revisions

[Maicon Stihler]

Hi, 

I'm having some troubles with files that get too large after a certain
time. What I would like to do is to erase past revisions and to keep
only a small number of revisions. I know that there is the admin -o
command, but Im not too sure how do I use it. I tried using 'cvs log
somefile' to see how many revisions the given file has, but I get this
error: CVS/Entries not found (or something alike, I dont remember the
right spelling) I found that logging is not enabled on cvs's config
file.

Could someone give me some tips and ideas of how to perform this task?

Best regards
Maicon