1. 使用安装光盘自制，以rhel5.5为例：

[tianjing@tianjing-ops Mon Feb 27 08:09 PM /etc/yum.repos.d]$vim rhel-local.repo

[RHEL_Server]
name=RHEL_Server
baseurl=http://192.168.224.131/RHEL5.5_x86_64/Server
enabled=1
gpgcheck=0
[RHEL_VT]
name=RHEL_VT
baseurl=http://192.168.224.131/RHEL5.5_x86_64/VT
enabled=1
gpgcheck=0
[RHEL_cluster]
name=RHEL_cluster
baseurl=http://192.168.224.131/RHEL5.5_x86_64/Cluster
enabled=1
gpgcheck=0
[RHEL_cs]
name=RHEL_cs
baseurl=http://192.168.224.131/RHEL5.5_x86_64/ClusterStorage
enabled=1

2. epel(http://centos.ustc.edu.cn/epel/5/x86_64/epel-release-5-4.noarch.rpm)

http://centos.ustc.edu.cn/epel/5/x86_64/

3. rpmforge(http://apt.sw.be/redhat/el5/en/x86_64/rpmforge/RPMS/rpmforge-release-0.5.2-2.el5.rf.x86_64.rpm)

http://apt.sw.be/

http://tree.repoforge.org/redhat/