Let's say I installed an antivirus program for a trial period. Then I did not like it and uninstalled it. But I am definitely sure that it leaves some files, traces etc. behind. So how can I clean my Ubuntu 12.04 OS that is like did not installed the trial program at all?
These will clear caches and remove programs and files that aren't used/needed anymore.
To remove personal information regarding the application, you would need to check in your /home
Run nautilus and enable hidden folders