备份配置文件
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak
新建CentOS-Base.repo配置:
vim /etc/yum.repos.d/CentOS-Base.repo
粘贴如下内容
[centos-office]
name=centos-office
failovermethod=priority
baseurl=https://vault.centos.org/6.10/os/x86_64/
gpgcheck=1
gpgkey=https://vault.centos.org/6.10/os/x86_64/RPM-GPG-KEY-CentOS-6
wq保存退出即可正常使用yum命令。