All the version releases of Ubuntu (Linux OS)

Here is a list of all the major releases of Ubuntu, along with their release date and codename:

1. Ubuntu 4.10 (Warty Warthog) - October 20, 2004
2. Ubuntu 5.04 (Hoary Hedgehog) - April 8, 2005
3. Ubuntu 5.10 (Breezy Badger) - October 13, 2005
4. Ubuntu 6.06 LTS (Dapper Drake) - June 1, 2006
5. Ubuntu 6.10 (Edgy Eft) - October 26, 2006
6. Ubuntu 7.04 (Feisty Fawn) - April 19, 2007
7. Ubuntu 7.10 (Gutsy Gibbon) - October 18, 2007
8. Ubuntu 8.04 LTS (Hardy Heron) - April 24, 2008
9. Ubuntu 8.10 (Intrepid Ibex) - October 30, 2008
10. Ubuntu 9.04 (Jaunty Jackalope) - April 23, 2009
11. Ubuntu 9.10 (Karmic Koala) - October 29, 2009
12. Ubuntu 10.04 LTS (Lucid Lynx) - April 29, 2010
13. Ubuntu 10.10 (Maverick Meerkat) - October 10, 2010
14. Ubuntu 11.04 (Natty Narwhal) - April 28, 2011
15. Ubuntu 11.10 (Oneiric Ocelot) - October 13, 2011
16. Ubuntu 12.04 LTS (Precise Pangolin) - April 26, 2012
17. Ubuntu 12.10 (Quantal Quetzal) - October 18, 2012
18. Ubuntu 13.04 (Raring Ringtail) - April 25, 2013
19. Ubuntu 13.10 (Saucy Salamander) - October 17, 2013
20. Ubuntu 14.04 LTS (Trusty Tahr) - April 17, 2014
21. Ubuntu 14.10 (Utopic Unicorn) - October 23, 2014
22. Ubuntu 15.04 (Vivid Vervet) - April 23, 2015
23. Ubuntu 15.10 (Wily Werewolf) - October 22, 2015
24. Ubuntu 16.04 LTS (Xenial Xerus) - April 21, 2016
25. Ubuntu 16.10 (Yakkety Yak) - October 13, 2016
26. Ubuntu 17.04 (Zesty Zapus) - April 13, 2017
27. Ubuntu 17.10 (Artful Aardvark) - October 19, 2017
28. Ubuntu 18.04 LTS (Bionic Beaver) - April 26, 2018
29. Ubuntu 18.10 (Cosmic Cuttlefish) - October 18, 2018
30. Ubuntu 19.04 (Disco Dingo) - April 18, 2019
31. Ubuntu 19.10 (Eoan Ermine) - October 17, 2019
32. Ubuntu 20.04 LTS (Focal Fossa) - April 23, 2020
33. Ubuntu 20.10 (Groovy Gorilla) - October 22