I couldn't figure out how to do view or change groups in Linux for a while. This page tells me most of the user management commands.

Link

There are a handful of ways to ignore file in SVN but only one method works for me -- editing the global-ignores list in the config file.

In Ubuntu the SVN config file is /etc/subversion/config.

look for the section [miscellany]

find global-ignores then add your file extension to the list.

Downloadable vmware images of ubuntu Linux.

Link