使用yum update出现错误

包都down下来后,安装时提示:
warning: rpmts_HdrFromFdno: Header V3 DSA signature: NOKEY, key ID 4f2a6fd2
public key not available for lockdev-devel-1.0.1-7.1.i386.rpm
源是:
[CN-base]
name=Fedora Core $releasever - $basearch - Base
baseurl=http://www.fedoraproject.org.cn/downloads/core/$releasever/$basearch/os/
[CN-updates-released]
name=Fedora Core $releasever - $basearch - Released Updates
baseurl=http://www.fedoraproject.org.cn/downloads/core/updates/$releasever/$basearch/
[geekbone-base]
name=Fedora Core $releasever - $basearch - Base
baseurl=http://mirrors.geekbone.org/fedora/core/$releasever/$basearch/os/
[geekbone-extras]
name=Fedora Extras $releasever - $basearch
baseurl=http://mirrors.geekbone.org/fedora/extras/$releasever/$basearch/
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-extras

这个key如何导入呢 :ask

上面的库配置有误

库分开来写吧，直观些：



http://www.linuxsir.org/bbs/showthread.php?t=218140