备份原有yum源，设置为自建yum源的脚本

#脚本开始

#!/bin/bash

cd /etc/yum.repos.d/

tar -zcvf yum.bak.tar.gz CentOS-*

rm -rf CentOS*

touch /etc/yum.repos.d/a.repo

cat>/etc/yum.repos.d/a.repo <<EOF

[base]

name=base

baseurl=http://172.16.103.3/centos/7/os/x86_64

gpgcheck=1

enabled=1

gpgkey=http://172.16.103.3/centos/RPM-GPG-KEY-CentOS-7

[update]

name=update

baseurl=http://172.16.103.3/centos/7/updates/x86_64/

gpgcheck=1

enabled=1

gpgkey=http://172.16.103.3/centos/RPM-GPG-KEY-CentOS-7

[extras]

name=extras

baseurl=http://172.16.103.3/centos/7/extras/x86_64

gpgcheck=1

enabled=1

gpgkey=http://172.16.103.3/centos/RPM-GPG-KEY-CentOS-7

[centosplus]

name=centosplus

baseurl=http://172.16.103.3/centos/7/centosplus/x86_64

gpgcheck=1

enabled=1

gpgkey=http://172.16.103.3/centos/RPM-GPG-KEY-CentOS-7

[epel]

name=epel

baseurl=http://172.16.103.3/epel/7/x86_64

gpgcheck=0

enabled=1

gpgkey=http://172.16.103.3/epel/RPM-GPG-KEY-EPEL-7

[epel-source]

name=epel-source

baseurl=http://172.16.103.3/epel/7/SRPMS

gpgcheck=0

enabled=1

gpgkey=http://172.16.103.3/epel/RPM-GPG-KEY-EPEL-7

EOF

yum clean all

yum makecache

#脚本结束