yum已被dnf替代

$ sudo yum groupinstall "Server with GUI"
Last metadata expiration check: 0:00:04 ago on Mon 30 Nov 2020 10:23:37 AM CST.
Warning: Group 'Server' does not exist.
Warning: Group 'with' does not exist.
Warning: Group 'GUI' does not exist.
Error: Nothing to do.

原因是目前比较新的Linux 发行版yum已经被dnf替代。
vim /usr/bin/yum 查看

#!/usr/bin/bash

args="$@"
append='Package(s) download url:'
for i in "