mount /dev/cdrom /media
##Centos5##
vi /etc/yum.repos.d/CentOS-Base.repo
[c5-media]
name=CentOS-$releasever - Media
baseurl=file:///media/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5
#gpgcheck=1 ---->>是否启动检查GPG-KEY
#enabled=1 ---->>是否启用YUM源
##pgkey=*** ---->>指定挂载目录下的GPG-KEY文件
##CentOS_6##
vi /etc/yum.repos.d/CentOS-Media.repo
[c6-media]
name=CentOS-$releasever - Media
baseurl=file:///media/CentOS/
## 添加或者修改为以下行 ##
file:///media/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
##CentOS_7##
[cdrom]
name=CentOS7 - cdrom
baseurl=file:///media/
enable=1
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
清除缓存 建立新缓存
[root@localhost ~]# yum clean all (清除缓存)
[root@localhost ~]# yum makecache (建立新缓存)
CentOS_6 搭建本地光盘YUM源
http://www.centoscn.com/p_w_picpath-text/config/2014/0629/3223.html