centos5 warning: rpmts_HdrFromFdno: Header V3 DSA signature: NOKEY, key ID e8562897

RHA5 Centos5上用yum安装程序时候，出现下面的异常问题：
Is this ok [y/N]: y
Downloading Packages:
warning: rpmts_HdrFromFdno: Header V3 DSA signature: NOKEY, key ID e8562897
    
RHA5
解决办法：

rpm --import http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-5 


如果是低版本，可以使用

rpm --import http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-centos4