ubuntu 20.04 更新源：常见问题场景：depends but it is not going to be installed

1.查看ubuntu 版本号

cat /etc/lsb-release

　　

 

2.寻找相应的源（建议匹配，否则安装软件时，会提示各种错误）

vim /etc/apt/sources.list

样例源：

#deb http://archive.ubuntu.com/ubuntu bionic main universe
#deb http://archive.ubuntu.com/ubuntu bionic-security main universe
#deb http://archive.ubuntu.com/ubuntu bionic-updates main universe
deb http://archive.ubuntu.com/ubuntu/ focal main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ focal main restricted universe multiverse

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

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

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

deb http://archive.canonical.com/ubuntu focal partner
deb-src http://archive.canonical.com/ubuntu focal partner

3.更新

sudo apt-get update

4.安装软件

sudo apt-get install -y git