Centos7更换Yum源
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.163.com/.help/CentOS7-Base-163.repo yum clean yum makecache
Centos6更换阿里云yum源
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup # CentOS6更换 wget -O /etc/yum.repos.d/CentOS-Base.repo # CentOS7更换 wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo yum clean yum makecache