Everybody who looks after or hosts more than one Joomla site on a linux server and has root access may be interested in a simple shell script that I wrote to update all Joomla sites on the server in a split second.

Documentation and script are available on my private site under:
www.matthiasraab.com/blog/joomla-and-it/...on-server-level.html

Feedback welcome.

Matthias