$ sudo cp -Rf /etc/yum.repo.d /etc/yum.repo.d_back

$ sudo rm -fr /etc/yum.repo.d/*

$ sudo gedit /etc/yum.repo.d/sources.repo
内容为如下：

[updates-beike]
name=Fedora updates
baseurl=ftp://202.204.60.11/pub/fedora/10/updates/
enabled=1
gpgcheck=0

[fedora-beike]
name=Fedora $releasever - $basearch
baseurl=ftp://202.204.60.11/pub/fedora/10/Everything/
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedorafile:///etc/pki/rpm-gpg/RPM-GPG-KEY



[Fedora-ftp.sjtu.edu.cn]
name=Fedora 10 - i386
baseurl=http://ftp.sjtu.edu.cn/fedora/linux/releases/10/Fedora/i386/os/
enabled=1
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedorafile:///etc/pki/rpm-gpg/RPM-GPG-KEY

[Everything-ftp.sjtu.edu.cn]
name=Everything 10 - i386
baseurl=http://ftp.sjtu.edu.cn/fedora/linux/releases/10/Everything/i386/os/
enabled=1
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedorafile:///etc/pki/rpm-gpg/RPM-GPG-KEY

[updates-ftp.sjtu.edu.cn]
name=Fedora updates
baseurl=http://ftp.sjtu.edu.cn/fedora/linux/updates/10/i386/
enabled=1
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedorafile:///etc/pki/rpm-gpg/RPM-GPG-KEY

[Fedora-bupt]
name=Fedora $releasever - $basearch
baseurl=ftp://ftp.bupt.edu.cn/pub/mirror/fedora/linux/releases/10/Fedora/i386/os/
enabled=1
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedorafile:///etc/pki/rpm-gpg/RPM-GPG-KEY

[Everything-bupt]
name=Everything $releasever - $basearch
baseurl=ftp://ftp.bupt.edu.cn/pub/mirror/fedora/linux/releases/10/Everything/i386/os/
enabled=1
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedorafile:///etc/pki/rpm-gpg/RPM-GPG-KEY





########################################################################################
########################################################################################
##以下作为备用的。
[Fedora-ftp.iij.ad.jp]
name=Fedora 10 - i386
baseurl=http://ftp.iij.ad.jp/pub/linux/fedora/releases/10/Fedora/i386/os/
enabled=1
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedorafile:///etc/pki/rpm-gpg/RPM-GPG-KEY

[Everything-ftp.iij.ad.jp]
name=Everything 10 - i386
baseurl=http://ftp.iij.ad.jp/pub/linux/fedora/releases/10/Everything/i386/os/
enabled=1
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedorafile:///etc/pki/rpm-gpg/RPM-GPG-KEY

[updates-ftp.iij.ad.jp]
name=Fedora updates
baseurl=http://ftp.iij.ad.jp/pub/linux/fedora/updates/10/i386/
enabled=1
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedorafile:///etc/pki/rpm-gpg/RPM-GPG-KEY


#[Everything-ftp.dti.ad.jp]
#name=Everything 10 - i386
#baseurl=http://ftp.dti.ad.jp/pub/Linux/Fedora/releases/10/Everything/i386/os/
#enabled=1
#gpgcheck=0
#gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedorafile:///etc/pki/rpm-gpg/RPM-GPG-KEY

[updates-ftp.dti.ad.jp]
name=Fedora updates
baseurl=http://ftp.dti.ad.jp/pub/Linux/Fedora/updates/10/i386/
enabled=1
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedorafile:///etc/pki/rpm-gpg/RPM-GPG-KEY



[Fedora-fr]
name=Fedora 10 - i386
baseurl=ftp://ftp.free.fr/mirrors/fedora.redhat/fedora/linux/releases/10/Fedora/i386/os/
enabled=1
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedorafile:///etc/pki/rpm-gpg/RPM-GPG-KEY

[Everything-fr]
name=Everything 10 - i386
baseurl=ftp://ftp.free.fr/mirrors/fedora.redhat/fedora/linux/releases/10/Everything/i386/os/
enabled=1
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedorafile:///etc/pki/rpm-gpg/RPM-GPG-KEY

[updates-fr]
name=Fedora updates
baseurl=ftp://ftp.free.fr/mirrors/fedora.redhat/fedora/linux/updates/10/i386/
enabled=1
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedorafile:///etc/pki/rpm-gpg/RPM-GPG-KEY

保存文件。

更新yum的缓存。 $ sudo yum makecache

有时上述教育网源中没有一些支持多媒体的包，这时候我们要添加一些非官方源，然后添加非官方的源，在此采用
rpmfusion提供的源比较方便，到网址
http://rpmfusion.org/Configuration
按提示执行就行，如果出现找不到密钥的话，只需
$ cd /etc/pki/rpm-gpg
# rpm --import RPM-GPG-KEY-rpmfusion*
然后再添加就行。完成后最好重启，以便使之生效。

最后可以考虑安装自动选择快速源工具
sudo yum install yum-fastestmirror