使用本地DVD镜像作更新源

# rpm -ivh createrepo-x.y.z.rpm

# rpm -ivh wget-x.y.z.rpm

对于DVD介质
# mkdir /mnt/dvd/

# mount /dev/cdrom /mnt/dvd/

# cd /mnt

# createrepo .

对于CD介质
# mkdir -p /mnt/{1,2,3,4,5,6}

# mount -o loop rhel5.1-disc1.iso /mnt/1

# mount -o loop rhel5.1-disc2.iso /mnt/2

# mount -o loop rhel5.1-disc3.iso /mnt/3

# mount -o loop rhel5.1-disc4.iso /mnt/4

# mount -o loop rhel5.1-disc5.iso /mnt/5

创建yum仓库
# cd /mnt/

# createrepo  -s sha .

or

#createrepo -s md5

编辑yum配置文件
[MailRepo]
name=Mail  
Repo
baseurl=file:///mnt/
enabled=1
gpgcheck=0
执行命令
# yum clean all