Solution for maintaining old Ubuntu Linux computer

If you have an old server with Ubuntu Linux distribution, which for some reason you can not update to newer version and you need to maintain it. During new program installation many errors tells us that  aptitude or apt-get can not find the path to the server from which we need to download required packets. Solution is very simple for the following Ubuntu Linux distributions: 

• Ubuntu 4.10 (Warty Warthog)
• Ubuntu 5.04 (Hoary Hedgehog)
• Ubuntu 5.10 (Breezy Badger)
• Ubuntu 6.06.2 LTS (Dapper Drake)
• Ubuntu 6.10 (Edgy Eft)
• Ubuntu 7.04 (Feisty Fawn)
• Ubuntu 7.10 (Gutsy Gibbon)
• Ubuntu 8.04.4 LTS (Hardy Heron)
• Ubuntu 8.10 (Intrepid Ibex)
• Ubuntu 9.04 (Jaunty Jackalope)
• Ubuntu 9.10 (Karmic Koala)
• Ubuntu 10.04.4 LTS (Lucid Lynx)
• Ubuntu 10.10 (Maverick Meerkat)
• Ubuntu 11.04 (Natty Narwhal)
• Ubuntu 11.10 (Oneiric Ocelot) 
• Ubuntu 12.04.3 LTS (Precise Pangolin)

All repositories for those distributions are located at: old-releases.ubuntu.com

How to make changes

Edit your /etc/apt/sources.list : 

change all urls from: http://<>.archive.ubuntu.com/ubuntu  to http://old-releases.ubuntu.com/ubuntu

And your old Ubuntu Linux is ready for update :)