Cleaning up Ubuntu 14.10,14.04,13.10 system

We have already discussed Cleaning up a Ubuntu GNU/Linux system and this tutorial is updated with new ubuntu versions and more tools added.If you want to clean your ubuntu machine you need to follow these simple steps to remove all unnecessary junk files.Remove partial packagesThis is yet another built-in feature, but this time it is not used in Synaptic Package Manager. It is used in the Terminal. Now, in the Terminal, key in the following commandsudo apt-get autocleanThen enact the package clean command. What this commnad does is to clean remove .deb packages that apt caches when you install/update programs. To use the clean command type the following in a terminal window:sudo apt-get cleanYou can then use the autoremove command. What the autoremove command does is to remove packages installed as dependencies after the original package is removed from the system. To use autoremove tye the following in a terminal window:sudo apt-get autoremoveTo clean the thumbnail cache:rm -f ~/.cache/thumbnails/normal/*