Backup script

This script can be browsed at http://tinlizzie.org/svn/trunk/back/ and
installed /home/vpri/backup-script/.  It backups web contents and
subversion repositories at tinlizzie.org server with 'rsync' and
'svnadmin dump' command.

* All web contents in tinlizzie (tinlizzie.org:/var/www/tinlizzie/)
  are saved to

/home/vpri/backup/backup-today/www/

* Home directories in tinlizzie (tinlizzie.org:/home/)
  are saved to

/home/vpri/backup/backup-today/home/

* Subversion repositories
  (tinlizzie.org:/var/www/tinlizzie/{svn|public-repository|repository})
  are saved as a dump format to

/home/vpri/backup/backup-today/*.dump

backup-today directory is copied to backup-yyyy-mm-dd
(e.g. 2008-10-24) before new contents are transferred from
tinlizzie. And they are kept in seven days at least.

* Log file:
/home/vpri/backup/backup.log at backup server

* How it works

The backup server connects tinlizzie.org with ssh-key withought pass
phrase.

* crontab setting (00:05 every night)

$ crontab -e
5 0 * * * time /home/vpri/backup-script/backup.py >> /home/vpri/backup/backup.log 2>&1

* Reference

Easy Automated Snapshot-Style Backups with Linux and Rsync
http://www.mikerubel.org/computers/rsync_snapshots/

* ToDo

Use rsync --link-dest instead of copy -al.
Directory name is one day older than actual backup date.