Centos8 yum源无法安装

1. 查看本机centos版本

[root@localhost ~]# cat /etc/centos-release
CentOS Linux release 8.5.2111

2. 到修改文件目录下

[root@localhost ~]# cd /etc/yum.repos.d/
[root@localhost yum.repos.d]# ls
CentOS-Linux-AppStream.repo          CentOS-Linux-Debuginfo.repo  CentOS-Linux-FastTrack.repo         CentOS-Linux-Plus.repo
CentOS-Linux-BaseOS.repo             CentOS-Linux-Devel.repo      CentOS-Linux-HighAvailability.repo  CentOS-Linux-PowerTools.repo
CentOS-Linux-ContinuousRelease.repo  CentOS-Linux-Extras.repo     CentOS-Linux-Media.repo             CentOS-Linux-Sources.repo

1. 只需要需改这两个文件夹

CentOS-Linux-AppStream.repo 
CentOS-Linux-BaseOS.repo

[root@localhost yum.repos.d]# vim CentOS-Linux-AppStream.repo

[appstream]
name=CentOS Linux $releasever - AppStream
#mirrorlist=http://mirror