以语雀 文档为准

1. https://releases.ubuntu.com/
2. https://old-releases.ubuntu.com/releases/
   | 版本号 | 版本代号 | 下载地址 |
   | — | — | — |
   | 14.04.5 | Trusty Tahr | https://old-releases.ubuntu.com/releases/14.04.5/ |
   | 14.10 | Utopic Unicorn | https://old-releases.ubuntu.com/releases/14.10/ |
   | 16.04.6 | Xenial Xerus | https://old-releases.ubuntu.com/releases/16.04.6/ |
   | 16.10 | Yakkety Yak | https://old-releases.ubuntu.com/releases/16.10/ |
   | 17.04 | Zesty Zapus | https://old-releases.ubuntu.com/releases/17.04/ |
   | 17.10 | Artful Aardvark | https://old-releases.ubuntu.com/releases/17.10/ |
   | 18.04 | Bionic Beaver | https://old-releases.ubuntu.com/releases/18.04/ |
   | 18.10 | Cosmic Cuttlefish | https://old-releases.ubuntu.com/releases/18.10/ |
   | 19.04 | Disco Dingo | https://old-releases.ubuntu.com/releases/19.04/ |
   | 19.10 | Eoan Ermine | https://old-releases.ubuntu.com/releases/19.10/ |
   | 20.04 | Focal Fossa | https://old-releases.ubuntu.com/releases/20.04/ |
   | 20.10 | Groovy Gorilla | https://old-releases.ubuntu.com/releases/20.10/ |
   | 21.04 | Hirsute Hippo | https://old-releases.ubuntu.com/releases/21.04/ |
   | 21.10 | Impish Indri | https://old-releases.ubuntu.com/releases/21.10/ |
   | 22.04 | Jammy Jellyfish | https://old-releases.ubuntu.com/releases/22.04.1/ |
   | 22.10 | Kinetic Kudu | https://releases.ubuntu.com/22.10/ |