Backup the Trac and Subversion in Linux Server

http://wiki.archlinux.org/index.php/Subversion_backup_and_restore

svnadmin dump /path/to/reponame > /tmp/reponame.dump ;
scp -rp /tmp/reponame.dump user@server.domain.com:/tmp/

http://trac.edgewall.org/wiki/TracBackup
$ trac-admin /path/to/projenv hotcopy /path/to/backupdir