redhat 安装yum

先去yum官网下载rpm包：

http://yum.baseurl.org/download/

下载以后开始安装

rpm -ivh yum-2.0.8-1.src.rpm

可能会报错：

[root@localhost hadmin]# rpm -ivh yum-2.0.8-1.src.rpm 
warning: yum-2.0.8-1.src.rpm: Header V3 DSA/SHA1 Signature, key ID 69886cc7: NOKEY
Updating / installing...
   1:yum-2.0.8-1                      ################################# [100%]
warning: user skvidal does not exist - using root
warning: group skvidal does not exist - using root
warning: user skvidal does not exist - using root
warning: group skvidal does not exist - using root

缺乏用户和用户组，那加上用户和用户组便可：

[root@localhost hadmin]# groupadd skvidal
[root@localhost hadmin]# useradd -r -g skvidal skvidal

最后从新安装便可成功