How to Yum on RHEL 6.3 or Scientific Linux 6.3 or Centos 6.3

Here is my final Script
At first Insert  Your RHEL 6.3 or Scientific Linux 6.3 or Centos 6.3 DVD your DVD ROM
# df -h [show where your dvd are mounted,i used here /dev/sr0 to /mnt]

please copy this script and Save as
yum.sh
after save this script plz set permission
#chmod +x yum.sh
#./yum.sh
df -h
cd /etc/yum.repos.d/
rm -rf *
touch /etc/yum.repos.d/rhel6.repo
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