使用yum通过Cent-OS的升级源升级RHEL 4

升级办法：
下载yum软件包：
http://www.chinalinuxpub.com/yum.tgz
tar zxvf yum.tgz
cd yum
rpm -ivh *.rpm
用得是centos得yum包，大家用了这个yum就可以在线用centos升级你得rhel4了
比较快的一个国内cent-os源是http://mirror.be10.com

vi /etc/yum.repos.d/CentOS-Base.repo

[base]
name=CentOS-4.4 – Base
baseurl=http://mirror.be10.com/centos/4/os/i386/
gpgcheck=1
gpgkey=http://mirror.be10.com/centos/RPM-GPG-KEY-centos4

#released updates
[update]
name=CentOS-4.4 – Updates
baseurl=http://mirror.be10.com/centos/4/updates/$basearch/
gpgcheck=1
gpgkey=http://mirror.be10.com/centos/RPM-GPG-KEY-centos4

#packages used/produced in the build but not released
[addons]
name=CentOS-4.4 – Addons
baseurl=http://mirror.be10.com/centos/4/addons/$basearch/
gpgcheck=1
gpgkey=http://mirror.be10.com/centos/RPM-GPG-KEY-centos4

#additional packages that may be useful
[extras]
name=CentOS-$releasever – Extras
baseurl=http://mirror.be10.com/centos/4/extras/$basearch/
gpgcheck=1
gpgkey=http://mirror.be10.com/centos/RPM-GPG-KEY-centos4

#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever – Plus
baseurl=http://mirror.be10.com/centos/4/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://mirror.be10.com/centos/RPM-GPG-KEY-centos4

#contrib – packages by Centos Users
[contrib]
name=CentOS-$releasever – Contrib
baseurl=http://mirror.be10.com/centos/4/contrib/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://mirror.be10.com/centos/RPM-GPG-KEY-centos4

使用yum update就可以升级了。