CentOS8 yum update 问题解决

Invalid configuration value: failovermethod=priority in /etc/yum.repos.d/CentOS-epel.repo; Configuration: OptionBinding with id "failovermethod" does not exist
CentOS Linux 8 - AppStream                                                               91  B/s |  38  B     00:00
Error: Failed to download metadata for repo 'appstream': Cannot prepare internal mirrorlist: No URLs in mirrorlist

1. Q1 解决

sudo vim /etc/yum.repos.d/CentOS-epel.repo  把 failovermethod 给注释掉

2. Q2 解决（换源）

• 第一步 cd /etc/yum.repos.d/
• 第二步 sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-*
• 第三步 sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-*