Introduction
In Linux, it is recommended to work in a terminal as a normal user and use sudo to run commands as a superuser in case you need root privileges for a specific task, instead of creating a root session with su and eventually shoot yourself in the foot (if you’re lucky), which is far more likely this way.
Problem
In a fresh Debian (Squeeze) installation however, sudo will not work. If you try to run sudo, you will get the following error message: