오래된 CentOS에 DVD로 yum 사용하기

mkdir /media/cdrom
mount -t iso9660 /dev/cdrom /media/cdrom

rm -f /etc/yum.repos.d/*.repo
vi /etc/yum.repos.d/DVD.repo
-----
[DVD_Repo]
name=Local_DVD_Repo
baseurl=file:///media/cdrom/
gpgcheck=0