yum源更新後需要導入key值，否則報錯如下，無法安裝相關的包。

　　Totalsize:42M

　　DownloadingPackages:

　　warning:rpmts_HdrFromFdno:HeaderV3RSA/SHA1Signature,keyIDc105b9de:NOKEY

　　Retrievingkeyfromfile:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6

　　GPGkeyretrievalfailed:[Errno14]Couldnotopen/readfile:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6

　　解決辦法：

　　先安裝如下工具包：

　　rpm-Uhvhttp://dag.wieers.com/packages/rpmforge-release/rpmforge-release-0.3.4-1.el4.rf.i386.rpm

　　[[email protected]]#rpm--import/etc/pki/rpm-gpg/RPM-GPG-KEY-6

　　一般來說安裝完成後即可，安裝完這個就可以了。

　　如果還是不行，查看系統的

　　編輯yum源文件：替換RPM-GPG-KEY-CentOS-5替換為對應的key文件名：RPM-GPG-KEY-CentOS-6（要全部替換）

　　[email protected]]#viCentOS-Base-sohu.repo

　　[base]

　　name=CentOS-$releasever-Base-sohu.com

　　mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os

　　baseurl=http://mirrors.sohu.com/centos/$releasever/os/$basearch/

　　gpgcheck=1

　　gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6

author gj

更新YUM源後的arning: rpmts_HdrFromFdno: Header V3 RSA/SHA1 Signature, key ID c105b9de: NOKEY錯誤