abc.archive.ubuntu.com not working on Zentyal or Ubuntu is an error that almost every IT professional come across during his career. I have just finished installation of Zentyal (Ubuntu) and when I tries to Install Modules, it start giving me errors that your pk.archive.ubuntu.com is not working, I have faced this issue year before but didn't try to write it on my blog and now its here to help others, Well I have tries below command sudo apt-get update abc.archive.ubuntu.com not working on Zentyal or Ubuntu Ign http://pk.archive.ubuntu.com precise Release.gpg and a large list of Ignore lists but there is a easy solution that I have done through terminal. Solution:- Access your Zentyal or Ubuntu Server from Terminal, after username / password run this command nano /etc/apt/sources.list ( you can also use vi or gedit ) Now Replace all pk (in your scenario, you can change your tld with US ) Press F3 to save file in nano editor Press Ctr...