Quoting Florian.Marquardt@dachser.com:
> By the way. Is there a way to backup the bugzilla databases?


Google it. mysqldump $dbname > "db_backup.$(date).sql"

I have a cron that runs nightly to dump my database to a backup server
using mysqldump.
mysqldump $dbname -u$dbuser -p$dbpass | mysql -h $host -D $dbname
-u$dbuser -p$dbpass