RedHat Linux6.4 使用yum安装时报错，改用CentOS yum源

在使用redhat linux的yum来安装或者更新软件的时候会有如下提示：

[root@node1 home]# yum install package_name
Loaded plugins: product-id, security, subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
Setting up Install Process
Nothing to do

经过翻译是没有经过注册的，查阅资料发现redhat的yum在线更新是收费的，如果没有注册的话不能使用，如果要使用，需将redhat的yum卸载后，重启安装，再配置其他源

解决办法：

• 首先到http://mirrors.163.com/centos下载软件包，本次为最新版本
  x86_64 地址：http://mirrors.163.com/centos/7.2.1511/os/x86_64/Packages/
  必要下载的软件包有（以64位系统为例）：
  1.1.python-iniparse-0.4-9.el7.noarch.rpm
  1.2.yum-3.4.3-132.el7.centos.0.1.noarch.rpm
  1.3.yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
  1.4.yum-plugin-fastestmirror-1.1.31-34.el7.noarch.rpm
  下载命令：

1.1.wget http://mirrors.163.com/centos/7.2.1511/os/x86_64/Packages/python-iniparse-0.4-9.el7.noarch.rpm
1.2.wget http://mirrors.163.com/centos/7.2.1511/os/x86_64/Packages/yum-3.4.3-132.el7.centos.0.1.noarch.rpm
1.3.wget http://mirrors.163.com/centos/7.2.1511/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
1.4.wget http://mirrors.163.com/centos/7.2.1511/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-34.el7.noarch.rpm

• 卸载RedHat自带的yum
  1> xargs是一条Unix和类Unix操作系统的常用命令。它的作用是将参数列表转换成小块分段传递给其他命令，以避免参数列表过长的问题
  2> –nodeps 强制卸载,不管依赖性

rpm -qa | grep yum | xargs rpm -e --nodeps

• 安装下载的centos的yum包：
  最后2个需要一起安装，否则会出现依赖性错误

rpm -ivh python-iniparse-0.4-9.el7.noarch.rpm
rpm -ivh yum-3.4.3-132.el7.centos.0.1.noarch.rpm
rpm -ivh yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
rpm -ivh yum-plugin-fastestmirror-1.1.31-34.el7.noarch.rpm

• 到http://mirrors.163.com的 centos帮助文档 中下载CentOS6-Base-163.repo文件，存放到/etc/yum.repo.d中

[root@gbasenode1 yum.repos.d]# wget http://mirrors.163.com/.help/CentOS6-Base-163.repo

• 编辑CentOS6-Base-163.repo文件，将其中的$releasever更改为centos的版本号
  下面是修改好的：

# 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-6.7 - Base - 163.com
baseurl=http://mirrors.163.com/centos/6.7/os/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=6.7&arch=$basearch&repo=os
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

#released updates 
[updates]
name=CentOS-6.7 - Updates - 163.com
baseurl=http://mirrors.163.com/centos/6.7/updates/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=6.7&arch=$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-6.7 - Extras - 163.com
baseurl=http://mirrors.163.com/centos/6.7/extras/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=6.7&arch=$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-6.7 - Plus - 163.com
baseurl=http://mirrors.163.com/centos/6.7/centosplus/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=6.7&arch=$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-6.7 - Contrib - 163.com
baseurl=http://mirrors.163.com/centos/6.7/contrib/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=6.7&arch=$basearch&repo=contrib
gpgcheck=1
enabled=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

• yum clean all 清除原有缓存
• yum makecache 获取yum列表
  出现下面提示，表示yum更改完成：
  Metadata Cache Created/元数据缓存已建立
• yum update 更新全部安装包，看需求，可有可无。

参考文档：http://blog.csdn.net/zhngjan/article/details/20843465 对该博客中的一些目前丢失包报404等问题进行了更改，本博客亲测有效。
如有问题，请在评论中指出，共同进步，谢谢！！！