要升级Fedora 11了，那么先找个速度快点的源。这个是上海交通大学的源，，速度比较快。
建先备份原来yum.repos.d下面的所有文件。mkdir /etc/yum.repos.d.bakcp -r /etc/yum.repos.d/* /etc/yum.repos.d.bak
创建yum源的文件
vi /etc/yum.repos.d/sjtu.repo输入如下内容：
[updates-beike]name=Fedora updatesbaseurl=ftp://202.204.60.11/pub/fedora/11/updates/enabled=1gpgcheck=0
[fedora-beike]name=Fedora $releasever – $basearchbaseurl=ftp://202.204.60.11/pub/fedora/11/Everything/enabled=1gpgcheck=1gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora file:///etc/pki/rpm-gpg/RPM-GPG-KEY
[Fedora-ftp.sjtu.edu.cn]name=Fedora 11 – i386baseurl=http://ftp.sjtu.edu.cn/fedora/linux/releases/11/Fedora/i386/os/enabled=1gpgcheck=0gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora file:///etc/pki/rpm-gpg/RPM-GPG-KEY
[Everything-ftp.sjtu.edu.cn]name=Everything 11 – i386baseurl=http://ftp.sjtu.edu.cn/fedora/linux/releases/11/Everything/i386/os/enabled=1gpgcheck=0gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora file:///etc/pki/rpm-gpg/RPM-GPG-KEY
[updates-ftp.sjtu.edu.cn]name=Fedora updatesbaseurl=http://ftp.sjtu.edu.cn/fedora/linux/updates/11/i386/enabled=1gpgcheck=0gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora file:///etc/pki/rpm-gpg/RPM-GPG-KEY
#[Everything-ftp.dti.ad.jp]#name=Everything 11 – i386#baseurl=http://ftp.dti.ad.jp/pub/Linux/Fedora/releases/11/Everything/i386/os/#enabled=1#gpgcheck=0#gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora file:///etc/pki/rpm-gpg/RPM-GPG-KEY
[updates-ftp.dti.ad.jp]name=Fedora updatesbaseurl=http://ftp.dti.ad.jp/pub/Linux/Fedora/updates/11/i386/enabled=1gpgcheck=0gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora file:///etc/pki/rpm-gpg/RPM-GPG-KEY
却还是，会愚蠢的选择相互敌视的方式。即使背脊相抵，
