[root@localhost ~]# cd /etc/yum.repos.d/
[root@localhost yum.repos.d]# gedit CentOS-Media.repo
[root@localhost yum.repos.d]# mv CentOS-Base.repo CentOS-Base.repo.zero
创建挂载文件夹
[root@localhost yum.repos.d]# mkdir /zero
挂载
[root@localhost yum.repos.d]# mount /dev/cdrom /zero/
[root@localhost yum.repos.d]# mount /dev/cdrom /zero/
