Update Centos 5.3 ke Centos 5.4 dengan Menggunakan bonus DVD Centos 5.4 dari majalah Info Linux

langkah :
1. masukkan DVD Centos 5.4 ke DVD ROM/RW
2. buat direktori baru dengan nama adenuxer di bawah direktori mnt
# mkdir -p /mnt/adenuxer
3. mounting DVD atau 5.4 ke /mnt/adenuxer
# mount -o loop /dev/dvdrw /mnt/adenuxer

4. edit file di /etc/yum.conf
# vi /etc/yum.conf
[main]
cachedir=/var/cache/yum
keepcache=0
debuglevel=2
logfile=/var/log/yum.log
distroverpkg=redhat-release
tolerant=1
exactarch=1
obsoletes=1
gpgcheck=1 ==> ubah gpgcheck=1 menjadi gpgcheck=0
plugins=1

# Note: yum-RHN-plugin doesn't honor this.
metadata_expire=1h

# Default.
# installonly_limit = 3

# PUT YOUR REPOS HERE OR IN separate files named file.repo
# in /etc/yum.repos.d

5. edit 2 file didalam /etc/yum.repos.d/
a. nonaktifkan CentOS-Base.repo dengan cara :
# mv CentOS-Base.repo CentOS-Base.repo.bak

b. lakukan edit ulang didalam file CentOS-Media.repo
# vi CentOS-Media.repo

# CentOS-Media.repo
#
# This repo is used to mount the default locations for a CDROM / DVD on
# CentOS-5. You can use this repo and yum to install items directly off the
# DVD ISO that we release.
#
# To use this repo, put in your DVD and use it with the other repos too:
# yum --enablerepo=c5-media [command]
#
# or for ONLY the media repo, do this:
#
# yum --disablerepo=\* --enablerepo=c5-media [command]

[c5-media]
name=CentOS-$releasever - Media
baseurl=file:///mnt/adenuxer ==> sesuaikan dengan posisi mounting saat melakukan langkah ke-3
# file:///media/cdrom/ ==> nonaktifkan
# file:///media/cdrecorder/ ==> nonaktifkan
gpgcheck=0
enabled=0 ==> rubah enabled=0 menjadi enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5
6. simpan file konfigurasi tersebut diatas dengan menekan :x atau :wq

7. lakukan perintah berikut
# yum -y check-update

# yum -y update

8. oke selamat mencoba