Fedora的清华大学yum源的配置

yum 是Fedora中十分方便的软件包管理工具，但是其默认的源全是国外的站点上的，极大地影响了其下载资源的速度；因此应将其改为国内的镜像，清华大学的镜像站就是教育网内比较完善的镜像站点；建议教育网用户将yum源改为清华大学的镜像，极变态地提高下载速度。

具体操作如下（终端）：
1. 获得root权限：
su
2. 将/etc/yum.repo.d改名；
mv /etc/yum.repo.d /etc/yum.repo.d~
若要还原该文件夹则输入：
mv /etc/yum.repo.d~ /etc/yum.repo.d
3.编辑/etc/yum.conf文件：
gedit /etc/yum.conf
将其改为:

cachedir=/var/cache/yum
keepcache=0
debuglevel=2
logfile=/var/log/yum.log
pkgpolicy=newest
distroverpkg=RedHat-release
tolerant=1
exactarch=1
obsoletes=1
gpgcheck=0
plugins=1
metadata_expire=1800

# PUT YOUR REPOS HERE OR IN separate files named file.repo
# in /etc/yum.repos.d

[extras]
name=Extras
baseurl=ftp://ftp3.tsinghua.edu.cn/mirror/download.fedora.redhat.com/pub/fedora/linux/extras/$releasever/$basearch/
enabled=1

[extras-source]
name=Extras
baseurl=ftp://ftp3.tsinghua.edu.cn/mirror/download.fedora.redhat.com/pub/fedora/linux/extras/$releasever/SRPMS/
enabled=1

[extras-debug]
name=Extras-debug
baseurl=http://download.fedora.redhat.com/pub/fedora/linux/extras/$releasever/$basearch/debug/
enabled=0

[extras-development]
name=Extras-development
baseurl=http://download.fedora.redhat.com/pub/fedora/linux/extras/development/$basearch/
enabled=0

[extras-development-debug]
name=Extras-development-debug
baseurl=http://download.fedora.redhat.com/pub/fedora/linux/extras/development/$releasever/debug/
enabled=0

[extras-development-source]
name=Extras-development-source
baseurl=http://download.fedora.redhat.com/pub/fedora/linux/extras/development/SRPMS/
enabled=0

[updates]
name=Updates
baseurl=ftp://ftp3.tsinghua.edu.cn/mirror/download.fedora.redhat.com/pub/fedora/linux/core/updates/$releasever/$basearch
enabled=1

[updates-source]
name=Updates-source
baseurl=ftp://ftp3.tsinghua.edu.cn/mirror/download.fedora.redhat.com/pub/fedora/linux/core/updates/$releasever/SRPMS
enabled=1

[updates-testing]
name=Updates-testing
baseurl=ftp://ftp3.tsinghua.edu.cn/mirror/download.fedora.redhat.com/pub/fedora/linux/core/updates/testing/$releasever/$basearch
enabled=0

[updates-testing-debug]
name=Updates-testing-debug
baseurl=http://download.fedora.redhat.com/pub/fedora/linux/core/updates/testing/$releasever/$basearch/debug/
enabled=0

[updates-testing-source]
name=Updates-testing-source
baseurl=ftp://ftp3.tsinghua.edu.cn/mirror/download.fedora.redhat.com/pub/fedora/linux/core/updates/testing/$releasever/SRPMS
enabled=0

[core]
name=Core
baseurl=ftp://ftp3.tsinghua.edu.cn/mirror/download.fedora.redhat.com/pub/fedora/linux/core/$releasever/$basearch/os