Redhat AS4和AS5快速升级至CentOS系统

单位很多服务器都是RedHat AS4和AS5的机器，平时经常需要安装和编译软件包，升级到CentOS系统能够方便不少!

网上查阅了相关资料，但是都不尽如人意，最终自己摸索出以下方法，和大家一起分享!

查看当前系统版本号

# less /etc/redhat-release

检查系统已安装的组件包中是否已存在Redhat的自带的yum系列组件包

# su root

# rpm -qa | grep yum

如果存在请逐一全部删除

# rpm -e --nodeps 组件包名称

建立Centos专用目录，然后下载并安装Centos系统的yum系列组件包

# su webuser

# cd /home/webuser

# mkdir centos

下载Centos升级组件包（注：根据RedHat AS4或RedHat AS5分别操作）

RedHat AS4：

# wget http://centos.ustc.edu.cn/centos/4.7/os/i386/CentOS/RPMS/python-elementtree-1.2.6-5.el4.centos.i386.rpm

# wget http://centos.ustc.edu.cn/centos/4.7/os/i386/CentOS/RPMS/python-sqlite-1.1.7-1.2.1.i386.rpm

# wget http://centos.ustc.edu.cn/centos/4.7/os/i386/CentOS/RPMS/python-urlgrabber-2.9.8-2.noarch.rpm

# wget http://centos.ustc.edu.cn/centos/4.7/os/i386/CentOS/RPMS/sqlite-3.3.6-2.i386.rpm

# wget http://centos.ustc.edu.cn/centos/4.7/os/i386/CentOS/RPMS/yum-2.4.3-4.el4.centos.noarch.rpm

# wget http://centos.ustc.edu.cn/centos/4.7/os/i386/CentOS/RPMS/yum-metadata-parser-1.0-8.el4.centos.i386.rpm

# wget http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-4

RedHat AS5：

# wget http://centos.ustc.edu.cn/centos/5.3/os/i386/CentOS/python-iniparse-0.2.3-4.el5.noarch.rpm

# wget http://centos.ustc.edu.cn/centos/5.3/os/i386/CentOS/yum-3.2.19-18.el5.centos.noarch.rpm

# wget http://centos.ustc.edu.cn/centos/5.3/os/i386/CentOS/yum-fastestmirror-1.1.16-13.el5.centos.noarch.rpm

# wget http://centos.ustc.edu.cn/centos/5.3/os/i386/CentOS/yum-metadata-parser-1.1.2-2.el5.i386.rpm

# wget http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-5

安装Centos升级组件包

# su root

# rpm -Uvh --nodeps /home/webuser/centos/*.rpm

导入Centos升级组件授权（注：根据RedHat AS4或RedHat AS5分别操作）

RedHat AS4：

# rpm --import /home/webuser/centos/RPM-GPG-KEY-CentOS-4

RedHat AS5：

# rpm --import /home/webuser/centos/RPM-GPG-KEY-CentOS-5

创建并编辑yum升级源配置文件

# su root

# mkdir -p /etc/yum.repos.d/

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

粘贴以下内容覆盖文件：

RedHat AS4：

[base]

name=CentOS-$releasever - Base

baseurl=http://centos.ustc.edu.cn/centos/4.7/os/$basearch/

gpgcheck=1

gpgkey= http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-4

#released updates

[update]

name=CentOS-$releasever - Updates

baseurl=http://centos.ustc.edu.cn/centos/4.7/updates/$basearch/

gpgcheck=1

gpgkey= http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-4

#packages used/produced in the build but not released

[addons]

name=CentOS-$releasever - Addons

baseurl=http://centos.ustc.edu.cn/centos/4.7/addons/$basearch/

gpgcheck=1

gpgkey= http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-4

#additional packages that may be useful

[extras]

name=CentOS-$releasever - Extras

baseurl=http://centos.ustc.edu.cn/centos/4.7/extras/$basearch/

gpgcheck=1

gpgkey= http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-4

#additional packages that extend functionality of existing packages

[centosplus]

name=CentOS-$releasever - Plus

baseurl=http://centos.ustc.edu.cn/centos/4.7/centosplus/$basearch/

gpgcheck=1

enabled=0

gpgkey= http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-4

#contrib - packages by Centos Users

[contrib]

name=CentOS-$releasever - Contrib

baseurl=http://centos.ustc.edu.cn/centos/4.7/contrib/$basearch/

gpgcheck=1

enabled=0

gpgkey= http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-4

RedHat AS5：

[base]

name=CentOS-$releasever - Base

baseurl=http://centos.ustc.edu.cn/centos/5.3/os/$basearch/

gpgcheck=1

gpgkey=http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-5

#released updates

[update]

name=CentOS-$releasever - Updates

baseurl=http://centos.ustc.edu.cn/centos/5.3/updates/$basearch/

gpgcheck=1

gpgkey=http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-5

#packages used/produced in the build but not released

[addons]

name=CentOS-$releasever - Addons

baseurl=http://centos.ustc.edu.cn/centos/5.3/addons/$basearch/

gpgcheck=1

gpgkey=http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-5

#additional packages that may be useful

[extras]

name=CentOS-$releasever - Extras

baseurl=http://centos.ustc.edu.cn/centos/5.3/extras/$basearch/

gpgcheck=1

gpgkey=http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-5

#additional packages that extend functionality of existing packages

[centosplus]

name=CentOS-$releasever - Plus

baseurl=http://centos.ustc.edu.cn/centos/5.3/centosplus/$basearch/

gpgcheck=1

enabled=0

gpgkey=http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-5

#contrib - packages by Centos Users

[contrib]

name=CentOS-$releasever - Contrib

baseurl=http://centos.ustc.edu.cn/centos/5.3/contrib/$basearch/

gpgcheck=1

enabled=0

gpgkey=http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-5

核对后保存并退出

开始升级系统

# yum update

等待系统列出需要升级的组件清单并按”y”确认

Total download size: 334 M

Is this ok [y/n]: y

…

Complete!

等待全部组件下载完成后，重新启动服务器，操作系统升级完毕！

Redhat AS4和AS5快速升级至CentOS系统

相关推荐