centos7修改yum源，包含X86和arm64两种架构

yum源配置

记录用到的yum源配置

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一、centos7 X86架构 使用阿里源

centos7替换官方源为阿里云的源

mkdir -p /etc/yum.repos.d/CentOS-Base.repo.backup;
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup;
# wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo;
# 没有wget命令的时候，可以用curl命令下载文件
curl  -o  /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo
yum makecache;
yum install wget -y;
wget -O /etc/yum.repos.d/epel-7.repo http://mirrors.aliyun.com/repo/epel-7.repo;
yum -y install epel-release;

二、centos8 X86架构 使用阿里源

centos8替换官方源为阿里云的源

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo_bak
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-8.repo
yum makecache
yum -y install epel-release

三、centos7 arm64架构 使用阿里源

地址：https://developer.aliyun.com/mirror/centos-altarch/?spm=a2c6h.13651104.d-2001.3.40cd320cmSNHMz

wget http://mirrors.aliyun.com/repo/Centos-altarch-7.repo -O /etc/yum.repos.d/CentOS-Base.repo

yum clean all
yum makecache