Subversion
複数人で使う時は

リポジトリのパーミッション

 % svn ls file:///svn/repos
 svn: Couldn't open a repository.
 svn: Unable to open an ra_local session to URL
 svn: Unable to open repository 'file:///svn/repos'
 svn: Berkeley DB error
 svn: Berkeley DB error while opening environment for filesystem /svn/repos/db:
 Permission denied

group writableにしておく
umask 002