#yum update -s

Is this ok [y/N]: y
        … … … 
# Error: You may also check that you have the correct GPG keys installed

不是吧!赶紧google了一下,发现国外有不少fedora用户遇见过类似问题,有个解决
 
方法是:
rpm --import
http://dag.wieers.com/packages/RPM-GPG-KEY.dag.txt

运行后不管用,仍然是这个错误,被yum郁闷到了,别灰心,继续找,终于在网上找
 
到了解决方法:
Run these from the terminal (command line):
rpm --import /usr/share/doc/fedora-release-3/RPM-GPG-KEY*
rpm --import
http://download.fedora.redhat.com/pu...-Fedora-Extras
rpm --import
http://rpm.livna.org/RPM-LIVNA-GPG-KEY

于是变通一下,运行:rpm --import /usr/share/doc/centos-release-3/RPM-GPG-KEY*完
 
了再运行yum update ethereal成功啦!---------------------题外:猜想刚才wget的那个dag-
 
gpg-key应该是不对的了,如果再import一次会不会有问题呢?于是:
rpm --import
http://dag.wieers.com/packages/RPM-GPG-KEY.dag.txt

然后再次:
yum -update wget (ethereal已update了,这次就update wget包吧!)
奇怪的是也成功了