fix E: Could not get lock /var/lib/apt/lists/lock problem

Problem

• error when use 

sudo apt-get update
E: Could not get lock /var/lib/apt/lists/lock - open (11: Resource temporarily unavailable)
E: Unable to lock directory /var/lib/apt/lists/
E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable)
E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it?

Solved

sudo su
sudo rm /var/lib/apt/lists/lock && sudo apt-get update

Ref

• http://linuxhalwa.blogspot.com/2013/11/how-to-fix-e-could-not-get-lock.html
• http://ubuntuforums.org/showthread.php?t=1631059