使用国内的源：fedoraproject.org.cn和geekbone
感谢Linuxsir.org 阿蟾
建/etc/yum.repos.d/fedora-cn.repo
[CN-base]
name=Fedora Core $releasever - $basearch - Base
baseurl=http://www.fedoraproject.org.cn/downloads/core/$releasever/$basearch/os/
#mirrorlist=http://fedora.redhat.com/download/mirrors/fedora-core-$releasever
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora
建/etc/yum.repos.d/fedora-updates-cn.repo
[CN-updates-released]
name=Fedora Core $releasever - $basearch - Released Updates
baseurl=http://www.fedoraproject.org.cn/downloads/core/updates/$releasever/$basearch/
#mirrorlist=http://fedora.redhat.com/download/mirrors/updates-released-fc$releasever
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora
建/etc/yum.repos.d/geekbone.repo
[geekbone]
name=Fedora Core $releasever - $basearch - Base
baseurl=http://mirrors.geekbone.org/fedora/core/$releasever/$basearch/os/
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora
禁国外的镜像（太慢）：
打开/etc/yum.repos.d/fedora.repo和/etc/yum.repos.d/fedora-updates.repo
enable=1改enable=0