This video tutorial in Computers & Programming category will show you how to delete temporary files in Ubuntu, Linux Mint or Debian. For this you will need the program called bleachbit. You could get it from Bleachbit Sourceforge/ or from Synaptic package manager. For synaptic manager, click on 'package manager' in the 'start' menu and log into the program by typing your password. Then search for 'bleachbit', download and install it. Go to 'terminal', type in 'su' and enter, then type in your password and click enter. Then type in 'bleachbit' and it will be launched as a root. Now you can select all 'cache' from all your browsers and other non-essential files and hit 'delete'. And that's it!