Each CERN user can request a personal SVN repository, which is a very good place to keep analysis code. To request such a repository, one must follow the instruction on the TWiki:
https://twiki.cern.ch/twiki/bin/view/AtlasComputing/SoftwareDevelopmentWorkBookSVN#Per_user_repositories_atlas_user
At “per-user repository” section, you must request a personal repository via the web form. Your request will be reviewed and ready in a few hours upon the approval.
If you have problems or questions about SVN repository request, you can send an email to: atlas-svn-managers@cern.ch
Once you have obtained the repository, you can access it in a terminal, for example like this
svn ls $SVNUSR/CERNUSERNAME
(replacing CERNUSERNAME above with your CERN username). You can also browse the content of your reprository on the web:
https://svnweb.cern.ch/trac/atlasusr/browser/CERNUSERNAME
By default, the personal repository is only accessible and readable by yourself. If you want to give other persons right to access the content (read access) or add/modify it (write access), you can do so at this page:
https://atlas-svnadmin.cern.ch/
At the bottom, you should see a link to your Personal repository.