1、查询redhat原有的yum

[root@localhost ~]# rpm -qa |grep yum

yum-metadata-parser-1.1.2-16.el6.x86_64

yum-rhn-plugin-0.9.1-40.el6.noarch

yum-plugin-security-1.1.30-14.el6.noarch

PackageKit-yum-0.5.8-20.el6.x86_64

yum-utils-1.1.30-14.el6.noarch

PackageKit-yum-plugin-0.5.8-20.el6.x86_64


2、删除redhat原有的yum

[root@localhost ~]# rpm -aq|grep yum|xargs rpm -e --nodeps

[root@localhost yum.repos.d]# whereis yum

yum: /etc/yum

[root@localhost yum.repos.d]# rm -rf /etc/yum


3、下载yum安装文件

在下载地址(http://mirrors.163.com/centos/6.6/os/x86_64/Packages/) 中

(以后centos升级,软件包会挪位置,一般从http://mirrors.163.com/centos 进去,找最新的系统版本即可)

rpm文件:

python-iniparse-0.3.1-2.1.el6.noarch.rpm

yum-3.2.29-60.el6.centos.noarch.rpm

yum-metadata-parser-1.1.2-16.el6.x86_64.rpm

yum-plugin-fastestmirror-1.1.30-30.el6.noarch.rpm


4、安装yum的rpm包

rpm -ivh python*

rpm -ivh yum*

[root@localhost yum]# rpm -ivh python-iniparse-0.3.1-2.1.el6.noarch.rpm 
warning: python-iniparse-0.3.1-2.1.el6.noarch.rpm: Header V3 RSA/SHA256 Signature, key ID c105b9de: NOKEY
Preparing... ########################################### [100%]
package python-iniparse-0.3.1-2.1.el6.noarch is already installed
[root@localhost yum]# rpm -ivh yum-*
warning: yum-3.2.29-60.el6.centos.noarch.rpm: Header V3 RSA/SHA1 Signature, key ID c105b9de: NOKEY
Preparing... ########################################### [100%]
1:yum-metadata-parser ########################################### [ 33%]
2:yum-plugin-fastestmirro########################################### [ 67%]
3:yum ########################################### [100%]
[root@localhost yum]#


5、更改yum源(我们使用网易的CentOS镜像源)

[root@localhost yum]# cd /etc/yum.repos.d/

[root@localhost yum.repos.d]# rm -rf *

[root@localhost yum.repos.d]# wget http://mirrors.163.com/.help/CentOS6-Base-163.repo

[root@localhost yum.repos.d]# vi CentOS6-Base-163.repo 

将所有 $releasever 修改为具体的版本号,我这里写的是6.6,以后centos再更新,有可能是6.7、6.8等,这个自己打开(http://mirrors.163.com/centos)找一下就可以。


如下为服务器操作记录:

[root@localhost yum]# cd /etc/yum.repos.d/
[root@localhost yum.repos.d]# ll
total 12
-rw-r--r--. 1 root root 4440 Nov 20 02:30 CentOS-Base.repo
-rw-r--r--. 1 root root 529 May 30 2012 rhel-source.repo.bak
[root@localhost yum.repos.d]# rm -rf *
[root@localhost yum.repos.d]# wget http://mirrors.163.com/.help/CentOS6-Base-163.repo
--2014-11-20 18:55:19-- http://mirrors.163.com/.help/CentOS6-Base-163.repo
Resolving mirrors.163.com... 123.58.173.106
Connecting to mirrors.163.com|123.58.173.106|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 2006 (2.0K) [application/octet-stream]
Saving to: ?.entOS6-Base-163.repo?

100%[=======================================================>] 2,006 --.-K/s in 0.03s

2014-11-20 18:55:19 (63.8 KB/s) - ?.entOS6-Base-163.repo?.saved [2006/2006]

[root@localhost yum.repos.d]# vi CentOS6-Base-163.repo

我的 CentOS6-Base-163.repo 内容如下:

# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client. You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the
# remarked out baseurl= line instead.
#
#

[base]
name=CentOS-$releasever - Base - 163.com
baseurl=http://mirrors.163.com/centos/6.6/os/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

#released updates
[updates]
name=CentOS-$releasever - Updates - 163.com
baseurl=http://mirrors.163.com/centos/6.6/updates/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras - 163.com
baseurl=http://mirrors.163.com/centos/6.6/extras/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus - 163.com
baseurl=http://mirrors.163.com/centos/6.6/centosplus/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus
gpgcheck=1
enabled=0
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

#contrib - packages by Centos Users
[contrib]
name=CentOS-$releasever - Contrib - 163.com
baseurl=http://mirrors.163.com/centos/6.6/contrib/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=contrib
gpgcheck=1
enabled=0
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

6、缓存处理

清理yum缓存

yum clean all

将服务器上的软件包信息缓存到本地,以提高搜索安装软件的速度

yum makecache

安装gcc

yum install gcc

至此,我们就可以使用yum安装和更新软件了。

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结束