阿里云
wget -O /etc/yum.repos.d/CentOS-Base.repo [http://mirrors.aliyun.com/repo/Centos-7.repo](http://mirrors.aliyun.com/repo/Centos-7.repo)
网易云（好评
wget -O /etc/yum.repos.d/CentOS-Base.repo [http://mirrors.163.com/.help/CentOS7-Base-163.repo](http://mirrors.163.com/.help/CentOS7-Base-163.repo)
运行之后
# 清除缓存：
yum clean all
# 生成缓存
yum makecache
#更新
yum update
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