一. 配置本地源
假定本地光盘位于/root/CentOS-7-x86_64-DVD-1511.iso
1、mkdir /media/cdrom
2、mount -t iso9660 /root/CentOS-7-x86_64-DVD-1511.iso /media/cdrom/
3、cd /etc/yum.repos.d
4、mv *.repo bak/
5、vim CentOS-Media.repo
# CentOS-Media.repo
[c6-media]
name=CentOS-$releasever - Media
baseurl=file:///media/cdrom
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
二. 配置网络yum源
1、cd /etc/yum.repos.d
2、mv *.repo bak/
3、wget http://mirrors.163.com/.help/CentOS7-Base-163.repo
4、yum clean all
5、yum repolist