I am very new to Linux (having just installed Ubuntu 12.10) and also new to XAMPP, which I installed because I want to run Lime Survey. I installed XAMPP from PPA and everything went well. However, I am having problems with the eAccelerator, which is deactivated. I tried to access opt/lampp/etc/php.ini but it says that permission is denied. Can anyone help me? Should I write anything before it? I tried it after writing sudo su in the terminal.