Centos更换yum源（阿里或本地镜像）

更换为阿里yum源

mkdir /etc/yum.repos.d/mkbbackup
mv -f /etc/yum.repos.d/* /etc/yum.repos.d/mkbbackup
echo "备份yum源文件完成"
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)
echo "下载阿里yum源文件完成"
yum clean all
yum makecache
echo "安装阿里yum安装完成"
yum install -y epel-release.noarch
yum clean all
yum makecache
echo "源缓存刷新完成"
yum repolist
echo "阿里云yum-repo添加完成"

本地镜像上传作为yum源

#!/bin/bash

{    
mkdir /mnt/cdrom
mkdir /opt/backup
mv /etc/yum.repos.d/* /opt/backup/
mount /home/CentOS-7-x86_64-Everything-1804.iso /mnt/cdrom
touch /etc/yum.repos.d/localCentOS.repo  #.repo文件加入以下内容
cd /etc/yum.repos.d
cat>localCentOS.repo<<EOF
[local]
name=localCentOS7
baseurl=file:///mnt/cdrom
enabled=1
gpgcheck=0
EOF
cd -
yum clean all
yum makecache
yum repolist
echo "本地yum源添加成功"
}