让Redhat使用Centos yum源

http://loneblog.com/blog/redhat-use-centos-yum-repo.html

由于正版的红帽需要RHN等注册才能使用yum服务源，因此对于我们这些实验用机很不柔道的说。因此我们要使用免费的centos做源！

方法是网上看来得，不过说实话对于版本兼容性问题，冷博客在这里还是打个问号的

不过一般实验用没问题，系统都是同根而生的呀

网上流传着南京啥啥大学ftp源，冷博客觉得这个不好，大学ftp说变就变，而且十有八九是教育网的速度不会很快，不如用163的。

这里特别谢谢163能提供国内知名的一个免费开源镜像！

方法如下：

[root@loneblog ~]# vim /etc/yum.repos.d/centos.repo

新建一个repo，填入如下内容，其实后几项没有必要，更新的时候特费时，把base 和 upate 填上就行！

[base]
name=CentOS-5-163-Base
baseurl=
gpgcheck=0
gpgkey=
[update]
name=CentOS-5-Updates
baseurl=
gpgcheck=0
gpgkey=
[addons]
name=CentOS-5-Addons
baseurl=
gpgcheck=0
gpgkey=

[extras]
name=CentOS-5-Extras
baseurl=
gpgcheck=0
gpgkey=

[centosplus]

name=CentOS-5-Plus
baseurl=
gpgcheck=0
gpgkey=

enabled=0
#contrib – packages by Centos Users
[contrib]
name=CentOS-5-Contrib
baseurl=
gpgcheck=0
gpgkey=

[dag]
name=Dag RPM Repository for RHEL5
enabled=1
baseurl=
gpgcheck=0
gpgkey=

然后gpgkey神马的随意~

测试一下

[root@loneblog ~]# yum reinstall nmap
Loaded plugins: rhnplugin, security
This system is not registered with RHN.
RHN support will be disabled.
Setting up Reinstall Process
Resolving Dependencies
–> Running transaction check
—> Package nmap.i386 2:4.11-1.1 set to be updated
–> Finished Dependency Resolution

Dependencies Resolved

================================================================================
Package         Arch            Version                Repository         Size
================================================================================
Reinstalling:
nmap            i386            2:4.11-1.1             addons            672 k

Transaction Summary
================================================================================
Remove        0 Package(s)
Reinstall     1 Package(s)
Downgrade     0 Package(s)

Total download size: 672 k
Is this ok [y/N]: y
Downloading Packages:
nmap-4.11-1.1.i386.rpm                                   | 672 kB     00:03
Running rpm_check_debug
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
  Installing     : nmap                                                     1/1

Installed:
  nmap.i386 2:4.11-1.1

Complete!

看到了吧速度嗖嗖的，672kB用了3秒~呵呵