Piwik
Installation
apt-get install php5-gd /etc/init.d/apache2 restart wget http://piwik.org/last.zip
Unzip it under e.g. <your website>/piwik
And prepare a Mysq database:
mysql> create database piwik; Query OK, 1 row affected (0.00 sec) mysql> GRANT ALL ON piwik.* TO piwik@localhost IDENTIFIED BY 'piwikpassword'; Query OK, 0 rows affected (0.00 sec)
Now you can visit http://<your website>/piwik and follow instructions to add the first site.
For more than one site, log in and check admin/sites
Documentation
Injection
of the javascript code into
Mediawiki
See here
Gallery2
See here
Wordpress
See here