redhat5.5利用 centos的yum 更新软件

由于redhat enterprise 的版权问题，很多软件不能更新，于是想到利用centos的yum源更新，下面是配置过程。

一、首先移除redhat的yum；

rpm -qa|grep yum
//查看yum相关的软件包；

rpm -e --nodeps yum*
//删除yum相关的软件包；

二、到centos的镜像文件或者安装光盘中寻找yum相关的软件包。

三、 在/etc/yum.repos.d/下面增加，CentOS-Base.repo文件，文件内容如下：

######################

[base]

name=CentOS-5 - Base

repo=os

baseurl=http://centos.ustc.edu.cn/centos/5/os/$basearch/

gpgcheck=1

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

[update]

name=CentOS-5 - Updates

baseurl=http://centos.ustc.edu.cn/centos/5/updates/$basearch/

gpgcheck=1

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

[addons]

name=CentOS-5 - Addons

baseurl=http://centos.ustc.edu.cn/centos/5/addons/$basearch/

gpgcheck=1

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

[extras]

name=CentOS-5 - Extras

baseurl=http://centos.ustc.edu.cn/centos/5/extras/$basearch/

gpgcheck=1

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

[centosplus]

name=CentOS-5 - Plus

baseurl=http://centos.ustc.edu.cn/centos/5/centosplus/$basearch/

gpgcheck=1

enabled=0

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

[contrib]

name=CentOS-5 - Contrib

baseurl=http://centos.ustc.edu.cn/centos/5/contrib/$basearch/

gpgcheck=1

enabled=0

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

###################

四、推荐一个yum源，rpmforge，在网上下载就可以。

上面这种方法是亲测好使的。在网上还搜到另一种解决方法，没测试，但是相对简单，感兴趣的可以试一试。

rm -f /etc/yum.repo.d/rhel-debuginfo.repo

vi /etc/yum.conf

[main]

cachedir=/var/cache/yum

keepcache=1

debuglevel=2

logfile=/var/log/yum.log

pkgpolicy=newest

distroverpkg=redhat-release

tolerant=1

exactarch=1

obsoletes=1

gpgcheck=1

plugins=1

metadata_expire=1800

# PUT YOUR REPOS HERE OR IN separate files named file.repo

# in /etc/yum.repos.d

[base]

name=centos-5 - Base

baseurl=http://centos.ustc.edu.cn/centos/5/os/i386/

# the other site: http://centos.candishosting.com.cn/centos/5/os/i386/
# you can find more site in: http://www.centos.org/modules/tinycontent/index.php?id=13
enabled=1

gpgcheck=1

gpgkey=http://centos.ustc.edu.cn/centos/5/os/i386/RPM-GPG-KEY-CentOS-5

#released updates

[update]

name=CentOS-5 - Updates

baseurl=http://mirror.centos.org/centos/5/updates/i386/

gpgcheck=1

gpgkey=http://centos.ustc.edu.cn/centos/5/os/i386/RPM-GPG-KEY-CentOS-5

#packages used/produced in the build but not released

[addons]

name=CentOS-5 - Addons

baseurl=http://mirror.centos.org/centos/5/addons/$basearch/

gpgcheck=1

gpgkey=http://centos.ustc.edu.cn/centos/5/os/i386/RPM-GPG-KEY-CentOS-5

#additional packages that may be useful

[extras]

name=CentOS-5 - Extras

baseurl=http://mirror.centos.org/centos/5/extras/$basearch/

gpgcheck=1

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos4

#additional packages that extend functionality of existing packages

[centosplus]

name=CentOS-5 - Plus

baseurl=http://mirror.centos.org/centos/5/centosplus/$basearch/

gpgcheck=1

enabled=0

gpgkey=http://centos.ustc.edu.cn/centos/5/os/i386/RPM-GPG-KEY-CentOS-5

#contrib - packages by Centos Users

[contrib]

name=CentOS-5 - Contrib

baseurl=http://mirror.centos.org/centos/5/contrib/$basearch/

gpgcheck=1

enabled=0

gpgkey=http://centos.ustc.edu.cn/centos/5/os/i386/RPM-GPG-KEY-CentOS-5

#packages in testing

[testing]

name=CentOS-5 - Testing

baseurl=http://mirror.centos.org/centos/5/testing/$basearch/

gpgcheck=1

enabled=0

gpgkey=http://centos.ustc.edu.cn/centos/5/os/i386/RPM-GPG-KEY-CentOS-5