fedora的yum配置文件/etc/yum.repos.d/fedora.repo：
[fedora]
name=Fedora $releasever - $basearch
failovermethod=priority
baseurl=http://fedora.candishosting.com.cn/pub/fedora/linux/releases/8/Everything/i386/os
#mirrorlist=http://mirrors.fedoraproject.org/mirrorlist?repo=fedora-$releasever&arch=$basearch
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora file:///etc/pki/rpm-gpg/RPM-GPG-KEY
<以下省略>
首先关注配置文件开头
name=Fedora $releasever - $basearch
对于本人的系统（fedora8狼人vmware安装）$releasever=8，$basearch=i386
再看第四行，原本是被注释掉的，解除注释后成为yum真正使用的镜像地址
接着看第五行，原本未被注释，所指示的是镜像列表的地址，这个地址实际上是个动态页面，根据‘？’后的内容返回不同的镜像地址，将$releasever=8，$basearch=i386代入后，返回的内容为：
# repo = fedora-8 arch = i386 country = CN country = RU country = JP country = HK country = PK country = KR country = TW country = TR country = TH country = IN http://fedora.candishosting.com.cn/pub/fedora/linux/releases/8/Everything/i386/os http://ftp.itu.edu.tr/Mirror/Fedora/linux/releases/8/Everything/i386/os http://seeder.yandex.net/fedora/linux/releases/8/Everything/i386/os http://dispenser.yandex.net/fedora/linux/releases/8/Everything/i386/os http://allotter.yandex.net/fedora/linux/releases/8/Everything/i386/os http://ftp.chg.ru/pub/Linux/fedora/linux/releases/8/Everything/i386/os http://spreader.yandex.net/fedora/linux/releases/8/Everything/i386/os http://fedora.mirrors.firstnetcom.com/fedora/releases/8/Everything/i386/os ftp://203.200.188.111/pub/fedora/linux/releases/8/Everything/i386/os http://ftp.yz.yamagata-u.ac.jp/pub/linux/fedora/linux/releases/8/Everything/i386/os http://ftp.kddilabs.jp/Linux/packages/fedora/releases/8/Everything/i386/os http://ftp.twaren.net/Linux/Fedora/linux/releases/8/Everything/i386/os http://ftp.isu.edu.tw/pub/Linux/Fedora/linux/releases/8/Everything/i386/os http://ftp.jaist.ac.jp/pub/Linux/Fedora/releases/8/Everything/i386/os http://opensource.nchc.org.tw/fedora/linux/releases/8/Everything/i386/os http://linux.ntcu.net/ftp/dists/fedora/releases/8/Everything/i386/os http://ftp.cse.yzu.edu.tw/pub/Linux/Fedora/releases/8/Everything/i386/os http://ftp.rhd.ru/pub/fedora/linux/releases/8/Everything/i386/os http://ftp.riken.jp/Linux/fedora/releases/8/Everything/i386/os http://ftp.kaist.ac.kr/pub/fedora/linux/releases/8/Everything/i386/os
还可添加country属性：
http://mirrors.fedoraproject.org/mirrorlist?repo=fedora-8&arch=i386&country=CN
返回：
# repo = fedora-8 arch = i386 country = CN http://fedora.candishosting.com.cn/pub/fedora/linux/releases/8/Everything/i386/os
这是中国（CN）的fedora8版本i386镜像。
用这个方法可以简便的查找官方镜像，速度尚可。
