Using MySQL
As you may now, you only have to run this command to install all the interesting components.
sudo apt-get install xwiki-enterprise-tomcat7-mysql
This virtual package depends on xwiki-enterprise-common, xwiki-enterprise-tomcat-common, xwiki-enterprise-mysql-common, mysql-server, tomcat7 and libmysql-java.
During the installation, you may have some questions from dbconfig, in charge of the configuration of the database. Don't confuse it with the MySQL root password prompt, which beg you to put a password for the superuser.
DBconfig prompt is about the configuration of xwiki and mysql. If you haven't any mysql already installed and you aren't familiar with it, you should let dbconfig handle this.
DBconfig is then asking you for the mysql root password (you may have entered before). Then, you can choose the password for the "xwiki" mysql user. This user will be used to connect from XWiki application, choose is wisely, but you don't have to pay a lot of attention to it, because after that, dbconfig is configuring XWiki automatically with these credentials.
The installation now ends, with the automatic start of tomcat daemon ("Starting Tomcat servlet engine tomcat7 [OK]").
You can now point your favorite browser to the following URL to use your wiki:
http://localhost:8080/xwikiNote that your wiki is absolutely empty, like a WAR installation. Distribution Wizard will take care of the rest.