redhat5.9配置yum
今天折腾了一天，首先配置yum的时候一直不正确，后来看到一篇帖子说需要卸载redhat自带的yum，重新安装，我卸载之后（rpm -aq|grep yum|xargs rpm -e --nodeps），安装的时候特别困难，一直无限的依赖，当时异常烦躁，后来细心检查发现是版本的问题。1、安装YUM
网易的镜像地址是http://mirrors.163.com/centos/5.9/os/x86_64，注意5.9是版本，
cat /etc/issue查看主机版本是redhat5.9，uname -a或者getconf LONG_BIT可以查出主机是64位机器，所以，下载所需的rpm时一定要选对版本。
需要的rpm包为：
yum-3.2.27-14.el6.centos.noarch.rpm
yum-metadata-parser-1.1.2-14.1.el6.x86_64.rpm
yum-plugin-fastestmirror-1.1.26-11.el6.noarch.rpm
python-iniparse-0.3.1-2.1.el6.noarch.rpm
具体文件名要去http://mirrors.163.com/centos/5.9/os/x86_64/CentOS/查看
用wget命令下载rpm包，
rpm -ivh python-iniparse-0.3.1-2.1.el6.noarch.rpm
rpm -ivh yum-metadata-parser-1.1.2-14.1.el6.x86_64.rpm
rpm -ivh yum-3.2.27-14.el6.centos.noarch.rpm um-plugin-fastestmirror-1.1.26-11.el6.noarch.rpm
注意最后两个包必需同时安装，否则会相互依赖(这句是帖子里的原话，我并没有遇到这个问题)
2、配置网易源
mv /etc/yum.repos.d/rhel-debuginfo.repo /etc/yum.repos.d/rhel-debuginfo.repo.repo.bak
vi /etc/yum.repos.d/rhel-debuginfo.repo
内容为：
name=CentOS-$releasever - Base
baseurl=http://mirrors.163.com/centos/5.9/os/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-5
#released updates
name=CentOS-$releasever - Updates
baseurl=http://mirrors.163.com/centos/5.9/updates/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-5
#packages used/produced in the build but not released
#
#name=CentOS-$releasever - Addons
#baseurl=http://mirrors.163.com/centos/$releasever/addons/$basearch/
#gpgcheck=1
#gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-5
#additional packages that may be useful
name=CentOS-$releasever - Extras
baseurl=http://mirrors.163.com/centos/5.9/extras/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-5
#additional packages that extend functionality of existing packages
name=CentOS-$releasever - Plus
baseurl=http://mirrors.163.com/centos/5.9/centosplus/$basearch/
gpgcheck=1
enabled=0
注意：文本中的5.9是版本， gpgkey的版本也要是5
测试：yum list|grep vim
发现yum配置成功
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