Ubuntu Tip : Reinstall Ubuntu automatically
There is a very simple command that reinstalls all the distribution packages and reconfigures them automatically. This is particularly helpful when you have done a partial upgrade and eventually have broken the system dependencies tree.
sudo dpkg-reconfigure -phigh -a
since this command would take a lot of time to process (~1 hour) depending on your hardware in case you have a minor dependency problem you can fix it via
sudo apt-get install -f