默认安装好Fedora后，yum就可以使用了，但由于服务器在国外，速度奇慢无比，因此需要手动设置一下，可大大提高yum的速度
1，安装 yum-fastestmirror 插件
yum install yum-fastestmirror -y
2，添加livna源，为了提高yum的下载速度，所以我们使用清华的源
先下载
ftp://ftp3.tsinghua.edu.cn/mirror/livna/livna-release-7.rpm
双击安装
编辑/etc/yum.repos.d/livna.repo
以root 编辑
gedit /etc/yum.repos.d/livna.repo
在baseurl= 下面添加清华的源
下面贴上我的配置
然后一行命令对整个系统升级
yum update -y
3，安装图形化的yum
yum install yumex
[livna]
name=Livna for Fedora Core $releasever - $basearch - Base
baseurl=
$releasever/$basearch/
$releasever/$basearch/
$releasever/$basearch/
$releasever/$basearch/
ftp://mirrors.tummy.com/pub/rpm.livna.org/fedora/$releasever/$basearch/
ftp://ftp3.tsinghua.edu.cn/mirror/livna/fedora/$releasever/$basearch/
failovermethod=priority
#mirrorlist=http://rpm.livna.org/mirrorlist-7
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-livna
[livna-debuginfo]
name=Livna for Fedora Core $releasever - $basearch - Debug
baseurl=
$releasever/$basearch/debug/
$releasever/$basearch/debug/
$releasever/$basearch/debug/
$releasever/$basearch/debug/
$releasever/$basearch/debug/
ftp://mirrors.tummy.com/pub/rpm.livna.org/fedora/$releasever/$basearch/debug/
ftp://ftp3.tsinghua.edu.cn/mirror/livna/fedora/$releasever/$basearch/debug/
failovermethod=priority
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-livna
gpgcheck=1
[livna-source]
name=Livna for Fedora Core $releasever - $basearch - Source
baseurl=
$releasever/SRPMS/
$releasever/SRPMS/
$releasever/SRPMS/
$releasever/SRPMS/
$releasever/SRPMS/
ftp://mirrors.tummy.com/pub/rpm.livna.org/fedora/$releasever/SRPMS/
ftp://ftp3.tsinghua.edu.cn/mirror/livna/fedora/$releasever/SRPMS/
failovermethod=priority
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-livna
gpgcheck=1