Since Trac uses a database backend, it requires some extra care to safely create a backup of a TracEnvironment. Luckily, TracAdmin has a command to make backups easier - hotcopy.
Note: Trac uses the hotcopy nomenclature to match that of Subversion, to make it easier to remember when managing both Trac and Subversion servers.
Creating a Backup
To create a backup of a live TracEnvironment, simply run:
$ trac-admin /some/where/mytracenv hotcopy /my/vault/mytracenv-backup
Note: TracAdmin will lock the database while copying.
The resulting backup copy is safe to handle using standard file-based backup tools like tar or dump/restore.
Restoring a Backup
Backups are simply a copied snapshot of the entire TracEnvironment directory structure, including the SQLite database.
To restore an environment from a backup, simply shut down your Trac service (Web server or tracd), restore the directory structure from backup and restart the service.
See also: TracAdmin, TracGuide