Старые версии Ubuntu

 Собственно ссылка на официальный сайт: http://old-releases.ubuntu.com/releases/

версии которые там присутствуют:

• 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 12.10 (Quantal Quetzal)
• Ubuntu 13.04 (Raring Ringtail)
• Ubuntu 13.10 (Saucy Salamander)
• Ubuntu 14.10 (Utopic Unicorn)
• Ubuntu 15.04 (Vivid Vervet)
• Ubuntu 15.10 (Wily Werewolf)

The following releases are also available which have been superseded by later point releases (the current point release is available on releases.ubuntu.com as usual):

• Ubuntu 12.04.4 LTS (Precise Pangolin)
• Ubuntu 14.04.3 LTS (Trusty Tahr)

Some old releases of Kubuntu, Edubuntu, and Xubuntu are also available here.
For current releases, see releases.ubuntu.com.