标签：http sed rsa less sig header 软件 system extra
问题：使用 Red Hat Enterprise Linux Server(RHEL) yum安装软件时显示 This system is not registered with RHN. RHN support will be disabled.
原因：
Red Hat Enterprise Linux Server(RHEL) 的yum服务是付费的，因为没有付费，所以无法使用yum安装软件，如RHEL想安装YUM，一种可行的办法是移植使用CentOS的YUM。
解决方法：
步骤一：卸载RHEL的yum，并下载CentOS的对应软件包
执行：rpm -qa|grep yum|xargs rpm -e --nodeps 将yum卸载掉
cat /etc/issue && uname -a 看一下系统版本号和系统位数
到 http://mirrors.kernel.org/centos/ 或 http://mirrors.163.com/centos/ 找对应系统版本号
如果系统是5.* 64位，则打开http://mirrors.kernel.org/centos/5/os/x86_64/CentOS/
如果系统是5.* 32位，则打开http://mirrors.kernel.org/centos/5/os/i386/CentOS/
如果系统是6.* 64位：http://mirrors.kernel.org/centos/6/os/x86_64/Packages/
如果系统是6.* 32位：http://mirrors.kernel.org/centos/6/os/i386/Packages/
下载的文件包括：
python-iniparse-0.3.1-2.1.el6.noarch.rpm
python-urlgrabber-3.9.1-11.el6.noarch.rpm
yum-3.2.29-73.el6.centos.noarch.rpm
yum-metadata-parser-1.1.2-16.el6.i686.rpm
yum-plugin-fastestmirror-1.1.30-37.el6.noarch.rpm
步骤二：安装CentOS的对应软件包
安装步骤：
rpm -ivh python-iniparse-0.3.1-2.1.el6.noarch.rpm
rpm -ivh yum-metadata-parser-1.1.2-16.el6.x86_64.rpm
rpm -ivh python-urlgrabber-3.9.1-11.el6.noarch.rpm
这一步可能出如下错误
warning: python-urlgrabber-3.9.1-11.el6.noarch.rpm: Header V3 RSA/SHA1 Signature, key ID c105b9de: NOKEY
Preparing... ########################################### [100%]
file /usr/lib/python2.6/site-packages/urlgrabber/grabber.py from install of python-urlgrabber-3.9.1-11.el6.noarch conflicts with file from package python-urlgrabber-3.9.1-8.el6.noarch
file /usr/lib/python2.6/site-packages/urlgrabber/grabber.pyc from install of python-urlgrabber-3.9.1-11.el6.noarch conflicts with file from package python-urlgrabber-3.9.1-8.el6.noarch
file /usr/lib/python2.6/site-packages/urlgrabber/grabber.pyo from install of python-urlgrabber-3.9.1-11.el6.noarch conflicts with file from package python-urlgrabber-3.9.1-8.el6.noarch
file /usr/lib/python2.6/site-packages/urlgrabber/progress.pyc from install of python-urlgrabber-3.9.1-11.el6.noarch conflicts with file from package python-urlgrabber-3.9.1-8.el6.noarch
file /usr/lib/python2.6/site-packages/urlgrabber/progress.pyo from install of python-urlgrabber-3.9.1-11.el6.noarch conflicts with file from package python-urlgrabber-3.9.1-8.el6.noarch
原因是包冲突，需要卸载原有的urlgrabber包：
[root@rchen98]# rpm -qa |grep urlgrabber
python-urlgrabber-3.9.1-8.el6.noarch
[root@rchen98]# rpm -e python-urlgrabber-3.9.1-8.el6.noarch
然后再安装。
然后安装yum
rpm -ivh yum-3.2.29-73.el6.centos.noarch.rpm yum-plugin-fastestmirror-1.1.30-37.el6.noarch.rpm
步骤三：生成yum.repos.d文件
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.repos.d中
#wget http://mirrors.163.com/.help/CentOS6-Base-163.repo
改名为：CentOS6-Base.repo
然后把文件里的$releasever都改为你的Linux版本（6或者5），也就是文件修改成如下即可：
# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client. You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the
# remarked out baseurl= line instead.
#
#
[base]
name=CentOS-6 - Base - 163.com
baseurl=http://mirrors.163.com/centos/6/os/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=os
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6
#released updates
[updates]
name=CentOS-6 - Updates - 163.com
baseurl=http://mirrors.163.com/centos/6/updates/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=updates
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6
#additional packages that may be useful
[extras]
name=CentOS-6 - Extras - 163.com
baseurl=http://mirrors.163.com/centos/6/extras/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=extras
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-6 - Plus - 163.com
baseurl=http://mirrors.163.com/centos/6/centosplus/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=centosplus
gpgcheck=1
enabled=0
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6
#contrib - packages by Centos Users
[contrib]
name=CentOS-6 - Contrib - 163.com
baseurl=http://mirrors.163.com/centos/6/contrib/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=contrib
gpgcheck=1
enabled=0
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6
步骤四：重建缓存
yum clean all 清除原有缓存
yum makecache 获取yum列表
等待，大约三分钟后出现下面提示，表示yum更改完成：
Metadata Cache Created
标签：http sed rsa less sig header 软件 system extra
原文地址：http://www.cnblogs.com/rchen98/p/6056469.html
