Backing Up Wiki

According to this there are three different things you want to backup:
 * 1) Database dump, e.g. mysqldump -h hostname -u userid -p --default-character-set=whatever dbname > backup.sql
 * 2) Create .tar of file system, which contains images and local config settings, e.g. tar zcvhf wikidata.tgz /srv/www/htdocs/wiki
 * 3) XML dump, contains content of wiki, technically a subset of the information in the database backup but it's good to have in case the database backup becomes unusable due to version issues or whatnot.  Performed using command-line tool dumpBackup.php, located in the maintenance directory.