安装yum报错

sudo apt-get install yum

提示如下： 

Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package yum

解决方法步骤

1. 修改镜像下载地址

先备份文件/etc/apt/sources.list

sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak 

如果出错可以还原： 

sudo cp /etc/apt/sources.list.bak  /etc/apt/sources.list

打开文件

sudo vim /etc/apt/sources.list 

 添加镜像地址

deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal main restricted
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-updates main restricted
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal universe
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-updates universe
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal multiverse
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-updates multiverse
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-backports main restricted universe multiverse
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-security main restricted
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-security universe
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-security multiverse

 镜像修改后一定要更新

apt-get update

更新后重新安装yum

sudo apt-get install yum

root@huashuke-lhq:/# sudo apt-get install yum
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 yum : Depends: python-sqlitecachec but it is not going to be installed
       Depends: python-urlgrabber but it is not going to be installed

提示缺少依赖包，按提示安装缺少的依赖包即可

sudo apt-get install python-sqlitecachec
sudo apt-get install python-urlgrabber