Java在linux系统的部署（2）： 系统环境的安装——更换免费的Yum源（转载）

更换redhat免费源的方式从网上找了一个，效果还不错，原网址：http://blog.chinaunix.net/uid-24727220-id-176948.html

由于，redhat企业版yum为收费项目，所以更换免费的源，这样在架设服务器的时候缺少某些组件可以用yum来进行添加，方便快捷，其实yum的速度没有太慢的，下面我将为大家介绍如何快速的修改yum源。
一、删除原yum所有组件
rpm -qa | grep yum | xargs rpm -e --nodeps #这条代码将删除redhat自带的yum
二、下载yum组件 yum.rar    
rpm包已经有了，自己下载解压
[root@localhost yum]# ll
total 1108
-rw-r--r-- 1 root root 34394 Feb 2509:46 python-iniparse-0.2.3-4.el5.noarch.rpm
-rw-r--r-- 1 root root 1026405 Feb 2509:45 yum-3.2.22-26.el5.centos.noarch.rpm
-rw-r--r-- 1 root root 19145 Feb 2509:46 yum-fastestmirror-1.1.16-14.el5.centos.1.noarch.rpm
-rw-r--r-- 1 root root 26053 Feb 2509:41 yum-metadata-parser-1.1.2-3.el5.centos.i386.rpm
三、下面将要安装着四个软件包，切记按照我的安装顺序来，否则会出现报错，切记~
 cd /tools/yum
rpm -ivhpython-iniparse-0.2.3-4.el5.noarch.rpm
rpm -ivhyum-metadata-parser-1.1.2-3.el5.centos.i386.rpm
rpm -ivhyum-3.2.22-26.el5.centos.noarch.rpm yum-fastestmirror-1.1.16-14.el5.centos.1.noarch.rpm
四、下面下载yum的配置文件CentOS-Base.rar   
上面的包是为redhat5.4准备的，如果你用不了的话，就把下面的代码写到CentOS-Base.repo中保存在/etc/yum.repos.d/
#CentOS-Base.repo
# # Thisfile uses a new mirrorlist system developed by Lance Davis for CentOS.
# Themirror system uses the connecting IP address of the client and the
# updatestatus of each mirror to pick mirrors that are updated to and
#geographically close to the client. You should use this for CentOS updates
# unlessyou are manually picking other mirrors.
#
# If themirrorlist= does not work for you, as a fall back you can try the
# remarkedout baseurl= line instead.
#
# [base]
name=CentOS-$releasever- Base
baseurl=http://centos.ustc.edu.cn/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-5
#releasedupdates
[updates]
name=CentOS-$releasever- Updates
baseurl=http://centos.ustc.edu.cn/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-5
#packagesused/produced in the build but not released
[addons]
name=CentOS-$releasever- Addons
baseurl=http://centos.ustc.edu.cn/centos/$releasever/addons/$basearch/
gpgcheck=1
gpgkey=http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-5
#additionalpackages that may be useful
[extras]
name=CentOS-$releasever- Extras
baseurl=http://centos.ustc.edu.cn/centos/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-5
#additionalpackages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever- Plus
baseurl=http://centos.ustc.edu.cn/centos/$releasever/centosplus/$basearch/
gpgcheck=1enabled=0
gpgkey=http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-5
 把这个文件放在   /etc/yum.repos.d/
 大功告成，yum已经更新为不用花钱的啦  
注：如何觉着下载这么多不方便，可以下下载 yum.rar  这个包，放在/tools/下面 
然后执行“sh/tools/yum/yum_stat.sh"  即可