Ubuntu Tweak is awesome Ubuntu app and we havealready discussed about it earlier. Now this tutorial explains you how you can use Ubuntu Tweak for cleaning up your system so its more likely a freshly installed one. [ALSO READ: Downloading and Installing Ubuntu Tweak]
Ubuntu Tweak provides you a cool handy feature called Computer Janitor. So first of all click Ubuntu’s Dash Home present at the top of your Ubuntu Launcher.
Type Ubuntu Tweak in search box and click top open the app. By default Ubuntu Tweak opens up its Overview tab. Click Janitor tab present on the top left corner, last tab of Ubuntu Teak.
From the left sidebar you can individually select caches you like cleaning up from your system. So tick the boxes like Firefox Cache, Software Center Cache, Personal Cache like Thumbnail Cache, System Cache like Apt Cache, Old Kernel, Packed Configs and Unneeded Packages etc.
As soon you tick any cache box, on the right site Janitor will provide you further selections you can choose. Now finally click the CLEAN button present on the bottom left corner.