Basically XAMPP is abbreviation of some technical terms like it is Cross Platform(X) Apache HTTP Server (A) MySql(M), PHP(P) and Pearl(P) server. Cross platform means it can run on various platform like Windows, Linux, Unix etc. It is first choice of Web developer because it is very lightweight in terms of size.
Command line process is one of the most easy method of XAMPP installation. You need Personal Package Archive (PPA) for the same.
There is Step by step procedure from download to complete installation on your Ubuntu machine: