Hi,
Which version of LAMPP you are using? I am using Ubuntu 14.4 and LAMP 1.8.3 with PHP5.
I want to use PHP 5.3 version on ubuntu but version 1.8 has graphical user installation using .run file and PHP version 5.5 version.
GUI installation automaically put lampp folder inside /opt/lampp folder,in case other version we need to put lampp folder inside /opt/lampp folder manually.
PrestaShop Tutorials Videos [How to do Tasks]
https://www.prestashop.com/forums/topic/907438-prestashop-tutorials-videos-how-to-do-tasks/