准备升级，先找个速度快点的源。。。这个是上海交通大学的源，速度很快！
建先备份原来yum.repos.d下面的所有文件。
mkdir /etc/yum.repos.d.bak
cp -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 updates
baseurl=ftp://202.204.60.11/pub/fedora/11/updates/
enabled=1
gpgcheck=0[fedora-beike]
name=Fedora $releasever - $basearch
baseurl=ftp://202.204.60.11/pub/fedora/11/Everything/
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora file:///etc/pki/rpm-gpg/RPM-GPG-KEY[Fedora-ftp.sjtu.edu.cn]
name=Fedora 11 - x86_64
baseurl=http://ftp.sjtu.edu.cn/fedora/linux/releases/$releasever/Fedora/$basearch/os/
enabled=1
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora file:///etc/pki/rpm-gpg/RPM-GPG-KEY[Everything-ftp.sjtu.edu.cn]
name=Everything 11 - x86_64
baseurl=http://ftp.sjtu.edu.cn/fedora/linux/releases/$releasever/Everything/$basearch/os/
enabled=1
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora file:///etc/pki/rpm-gpg/RPM-GPG-KEY[updates-ftp.sjtu.edu.cn]
name=Fedora updates
baseurl=http://ftp.sjtu.edu.cn/fedora/linux/updates/$releasever/$basearch/
enabled=1
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora file:///etc/pki/rpm-gpg/RPM-GPG-KEY#[Everything-ftp.dti.ad.jp]
#name=Everything 11 - i386
#baseurl=http://ftp.dti.ad.jp/pub/Linux/Fedora/releases/11/Everything/$basearch/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 updates
baseurl=http://ftp.dti.ad.jp/pub/Linux/Fedora/updates/11/i386/
enabled=1
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora file:///etc/pki/rpm-gpg/RPM-GPG-KEY
最后$yum makecache