一键yum源

#!/bin/bash
echo -e "\033[31m =====正在验证当前为仅主机还是NAT模式===== \033[0m"
ping -c2 -w2 www.baidu.com &> /dev/null
if [ $? -eq 0 ];then echo -e "\033[31m 检测当前为NAT模式，为您配置在线yum源 \033[0m"
mkdir -p /etc/yum.repos.d/repo.bak

mv -f /etc/yum.repos.d/* /etc/yum.repos.d/repo.bak &> /dev/null

wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo &> /dev/null

yum clean all &> /dev/null
yum list &> /dev/null
echo -e "\033[31m 在线源已配置完成 \033[0m"

else
echo -e "\033[31m 检测当前为仅主机模式，为您配置本地yum源 \033[0m"
mount /dev/sr0 /mnt &> /dev/null
cd /etc/yum.repos.d/
mkdir -p /etc/yum.repos.d/repo.bak

mv -f /etc/yum.repos.d/* /etc/yum.repos.d/repo.bak &> /dev/null

echo '[local]
name=local
baseurl=file:///mnt
enabled=1
gpgcheck=0' > /etc/yum.repos.d/local.repo
yum clean all &> /dev/null
yum makecache &> /dev/null

df -h | grep "/mnt" 
if [ $? -ne 0 ];then
echo -e "\033[31m 检测当前为仅主机模式，但光盘未连接！ \033[0m"
else
echo -e "\033[31m 本地yum源已配置完成 \033[0m"
fi
fi