Everything seems fine while I was using “Ubuntu 11.04″ with my customized items. But, after released 12.04 ‘Precise Pangolin’, and it’s LTS version, then I want to use it.

The very first error when i try to update software packages in Ubuntu i get following error :

E: Could Not Get Lock /var/lib/apt/lists/lock

If you’re facing the same error, run Terminal and type these commands:

sudo rm /var/lib/apt/lists/lock
sudo apt-get clean
sudo apt-get update

Hope, it’s solved! ^^