Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I almost nothing about Ubuntu. When I try to run the command to install of a package, I am said that 'unable to locate package'

When I try to run sudo apt-get update, the system seems being blocked! Here's what I get:

enter image description here

Does anybody has an idea ?

share|improve this question
This is a duplicate of… – January Aug 22 '12 at 5:22

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.