It looks like you can use rm:
In my opinion Xampp for Linux is a bad idea. You should almost always install software for Linux though the package manager (the equivalent of an app store). That way you get fewer problems, auto updates, and less work all round.
There are several says to do this. The quickest is probably to type this into a terminal:
sudo apt-get install tasksel
sudo tasksel install lamp-server
Install PHPMyAdmin: [help.ubuntu.com
1) Open Ubuntu Software Manager
2) Install Synaptic
3) Install tasksel
4) Close Software manager
5) Open Synaptic
6) Edit > mark packages by task
7) Select "LAMP server" and click OK.
8) Click "apply" button in toolbar
6) search for and phpmyadmin, click on tickbox and select "mark for installation".
7) Click "apply" button again.
Compared to XAMPP:
The main disadvantage is that you have to install some extra stuff separately (e.g. phpmyadmin)
The advantages are the auto-updates, and that the package manager knows that you have Apache, PHP etc. installed, so you can install any other Apache modules, PHP libraries, etc. you need through the package manager.