" You may also check that you have the correct GPG keys installed"

CentOS 3
在 yum install xxx 的時候一直會出現如下的錯誤：

" You may also check that you have the correct GPG keys installed"

執行如下指令：
# rpm --import http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-3