• 通过脚本更新YUM源

the first is backup original yum folder to the .bak
sudo mv /etc/yum.repos.d/ /etc/yum.repos.d.bak
new make directory of the /etc/yum.repos.d/
sudo mkdir /etc/yum.repos.d/
download the aliyun yum resource
sudo wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
clean cache of the old yum resource
sudo yum clean all
reestablishment yum resource
sudo yum makecache

• 手动更新YUM源

依次执行上面脚本shell命令即可

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