Mediawiki backup

Backing up the contents of this wiki using: (see also mediawiki backing up a wiki)

D=`date --iso-8601`
mysqldump -u wikiuser -p --default-character-set=utf8 wikitech |gzip > backup-wikitech-sql-$D.sql.gz
sudo tar -czf backup-wikitech-files-$D.tar.gz /var/lib/mediawiki/ /etc/mediawiki*
sudo cp backup-wikitech-* ~/big/backup/

ssh pi3
cd backup
rsync -vaz pomo:big/backup .