我们需要根据我们自己Ubuntu系统版本来配置对应的apt源

一、常见LTS版本代号

Ubuntu 20.04代号为：focalUbuntu 19.04代号为：discoUbuntu 18.04代号为：bionicUbuntu 17.04代号为：zestyUbuntu 16.04代号为：xenial

二、查看linuxOS发行版本信息

查看命令：

lsb_release -a

ubuntu 20.04 ==> 发行版本代号为 focal

$ lsb_release -a

Distributor ID: Ubuntu

Description: Ubuntu 20.04.1 LTS

Release: 20.04

Codename: focal

ubuntu 18.04 ==> 发行版本代号为 bionic

$ lsb_release -a

Distributor ID: Ubuntu

Description: Ubuntu 18.04.6 LTS

Release: 18.04

Codename: bionic

三、修改apt源

1. 修改sources.list文件

sudo gedit /etc/apt/sources.list

ubuntu 20.04

# 阿里源

deb http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse

deb-src http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse

deb-src http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse

deb-src http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse

deb-src http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse

deb-src http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse

ubuntu 18.04

# 阿里源

deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse

deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse

deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse

deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse

deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse

deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse

2.更新

$ sudo apt-get update

$ sudo apt-get upgrade

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