Joomla-Installation - no mysql
If you get the message MySQL support Unavailable The reason may be that MySQL 5 is installed. But you need 4.1.
apt-get remove --purge mysql-common apt-get install mysql-server-4.1 php4-mysql
Joomla - Problems
If you get several error messages in the website saying
headers already sent by
the reason is that in a .php file there is a newline at the end. E.g. in /languages/german.php. Logging into the administrator area is also not possible then.