#gedit /root/tsinghua.repo

内容如下：

[freshrpms]
name=Freshrpms
baseurl=ftp://ftp3.tsinghua.edu.cn/mirror/ayo.freshrpms.net/pub/freshrpms/ayo/fedora/linux/5/i386/freshrpms
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-freshrpms
gpgcheck=0


[linva]
name=linva
baseurl=ftp://ftp3.tsinghua.edu.cn/mirror/livna/fedora/5/i386
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-freshrpms
gpgcheck=0


[livnadev]
name=livna
baseurl=ftp://ftp3.tsinghua.edu.cn/mirror/livna/fedora/development/i386
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-freshrpms
gpgcheck=0


[linvatest]
name=linva
baseurl=ftp://ftp3.tsinghua.edu.cn/mirror/livna/fedora/testing/5/i386
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-freshrpms
gpgcheck=0


[core]
name=core
baseurl=ftp://ftp3.tsinghua.edu.cn/mirror/download.fedora.redhat.com/pub/fedora/linux/core/5/i386/os/
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-freshrpms
gpgcheck=0


[coreupdates]
name=core-updates
baseurl=ftp://ftp3.tsinghua.edu.cn/mirror/download.fedora.redhat.com/pub/fedora/linux/core/updates/5/i386
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-freshrpms
gpgcheck=0


[coreupdatestesting]
name=core-updates-testing
baseurl=ftp://ftp3.tsinghua.edu.cn/mirror/download.fedora.redhat.com/pub/fedora/linux/core/updates/testing/5/i386
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-freshrpms
gpgcheck=0


[coredevelop]
name=core-development
baseurl=ftp://ftp3.tsinghua.edu.cn/mirror/download.fedora.redhat.com/pub/fedora/linux/core/development/i386/
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-freshrpms
gpgcheck=0


[extras]
name=develop
baseurl=ftp://202.38.97.230/sites/fedora.redhat.com/linux/extras/5/i386
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-freshrpms
gpgcheck=0




然后备份之前的/etc/yum.repos.d/文件夹为/etc/yum.repos.d.bak/
#mv /etc/yum.repos.d/ /etc/yum.repos.d.bak/

再新建/etc/yum.repos.d/文件夹
#mkdir /etc/yum.repos.d/

把tsinghua.repo拷过来
#cp /root/tsinghus.repo /etc/yum.repos.d/