This one is giving me a headache... I have installed XAMPP for Linux 1.7.7 on Ubuntu 12.10. I haven't installed the latest version because of the new security "feature" which makes XAMPP so secure I can't get it running... But that's another story. After it installed and ran ok for a couple of months, I now get the famous "XAMPP: Another web server daemon is already running." error while starting XAMPP. Now I've googled extensively and can rule out the following: There is no other Apache installation, just XAMPP There are no apache or apache 2 services running There are no services running that use port 80 (checked with netstat -an grep -w 80) I have also done a fresh install of xampp 1.7.7, but that gives me the same result. I think I have tried every solution on the first two result-pages of google and am nowhere nearer to a solution. Can anyone give me pointers on how to find the mysterious "Webdeamon" that is already running?