用yum 安装软件的时候出现了一下错误：
warning: rpmts_HdrFromFdno: Header V3 DSA signature: NOKEY, key ID e8562897
update/gpgkey
Public key for apr-util-1.2.7-11.el5_5.1.i386.rpm is not installed
解决方法：rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
本文出自 “Doyle” 博客，请务必保留此出处http://conandoyle.blog.51cto.com/11462365/1766957
Public key for apr-util-1.2.7-11.el5_5.1.i386.rpm is not installed
原文：http://conandoyle.blog.51cto.com/11462365/1766957