配置yum.repo---Centos6.8

[root@nebula /]# cd /etc/yum.repos.d/
[root@nebula yum.repos.d]# mkdir bak
[root@nebula yum.repos.d]# mv Cen* bak
[root@nebula yum.repos.d]# vi yum.repo

[CentOS6.8]
name=CentOS6.8
baseurl=file:///media        
gpgcheck=0
enabled=1

[root@nebula yum.repos.d]# mount /dev/sr0 /media/
mount: block device /dev/sr0 is write-protected, mounting read-only


[root@nebula yum.repos.d]# yum clean all
[root@nebula yum.repos.d]# yum makecache

[root@nebula yum.repos.d]# yum install man -y