查看当前系统版本

$ lsb_release -a

查看是否存在该版本的源

​​http://mirrors.163.com/ubuntu/dists/​​ http://mirrors.aliyun.com/ubuntu/dists/

sources.list模板

(将TODO改为版本代号)

deb http://mirrors.163.com/ubuntu/ TODO main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ TODO-security main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ TODO-updates main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ TODO-proposed main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ TODO-backports main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ TODO main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ TODO-security main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ TODO-updates main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ TODO-proposed main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ TODO-backports main restricted universe multiverse

版本与代号

4.10 Warty Warthog(长疣的疣猪)
5.04 Hoary Hedgehog(灰白的刺猬)
5.10 Breezy Badger(活泼的獾)

6.06(LTS) Dapper Drake(整洁的公鸭)
6.10 Edgy Eft(急躁的水蜥)
7.04 Feisty Fawn(坏脾气的小鹿)
7.10 Gutsy Gibbon(勇敢的长臂猿)

8.04(LTS) Hardy Heron(耐寒的苍鹭)
8.10 Intrepid Ibex (勇敢的野山羊)
9.04 Jaunty Jackalope(得意洋洋的怀俄明野兔)
9.10 Karmic Koala(幸运的考拉)

10.04(LTS) Lucid Lynx(清醒的猞猁)
10.10 Oneiric Ocelot(梦幻的豹猫)
11.04 Natty Narwhal(敏捷的独角鲸)
11.10 Oneiric Ocelot（有梦的虎猫）

12.04(LTS) Precise Pangolin(精准的穿山甲)
12.10 Quantal Quetzal(量子的绿咬鹃)
13.04 Raring Ringtail(铆足了劲的猫熊)
13.10 Saucy Salamander(活泼的蝾螈)

14.04(LTS) Trusty Tahr (可靠的塔尔羊)(LTS)
14.10 Utopic Unicorn(乌托邦独角兽)
15.04 Vivid Vervet (活泼的小猴)
15.10 Wily Werewolf (狡猾的狼人)

16.04(LTS) Xenial Xerus (好客的非洲地松鼠)
16.10 Yakkety Yak（牦牛）
17.04 Zesty Zapus(开心的跳鼠)
17.10 Artful Aardvark(机灵的土豚)

18.04(LTS) Bionic Beaver（仿生海狸）
18.10 Cosmic Cuttlefish（宇宙墨鱼）
19.04 Disco Dingo（舞动的灵犬）
19.10 Eoan Ermine（白貂）

20.04(LTS) Focal Fossa（专注的马达加斯加长尾狸猫）
21.10 Impish Indri （淘气的狐猴）

22.04(LTS) Jammy Jellyfish (果酱水母)

参考

​​将Ubuntu的源改为国内源​​