sudo rpm -Uvh
sudo rpm -Uvh
[fedora]name=Fedora releasever – basearch – sohu.comfailovermethod=prioritybaseurl=http://mirrors.sohu.com/fedora/releases/releasever/Everything/basearch/os/mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=fedora-releasever&arch=basearchenabled=1metadata_expire=7dgpgcheck=1gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-basearch[fedora-debuginfo]name=Fedora releasever – basearch – Debug – sohu.comfailovermethod=prioritybaseurl=http://mirrors.sohu.com/fedora/releases/releasever/Everything/basearch/debug/mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=fedora-debug-releasever&arch=basearchenabled=0metadata_expire=7dgpgcheck=1gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-basearch[fedora-source]name=Fedora releasever – Source – sohu.comfailovermethod=prioritybaseurl=http://mirrors.sohu.com/fedora/releases/releasever/Everything/source/SRPMS/mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=fedora-source-releasever&arch=basearchenabled=0metadata_expire=7dgpgcheck=1gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-basearch
[updates]name=Fedora releasever – basearch – Updates – sohu.comfailovermethod=prioritybaseurl=http://mirrors.sohu.com/fedora/updates/releasever/basearch/mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=updates-released-freleasever&arch=basearchenabled=1gpgcheck=1gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-basearch[updates-debuginfo]name=Fedora releasever – basearch – Updates – Debug – sohu.comfailovermethod=prioritybaseurl=http://mirrors.sohu.com/fedora/updates/releasever/basearch/debug/mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=updates-released-debug-freleasever&arch=basearchenabled=0gpgcheck=1gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-basearch[updates-source]name=Fedora releasever – Updates Source – sohu.comfailovermethod=prioritybaseurl=http://mirrors.sohu.com/fedora/updates/releasever/SRPMS/mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=updates-released-source-freleasever&arch=basearchenabled=0gpgcheck=1gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-basearch
p { margin-bottom: 0.21cm; }
[Fedora-mirrors.163.com]name=Fedora 12 – i386baseurl=http://mirrors.163.com/fedora/updates/12/i386/enabled=1gpgcheck=0gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-Fedora file:///etc/pki/rpm-gpg/RPM-GPG-KEY[Everything-mirrors.163.com]name=Everything 12 – i386baseurl=http://mirrors.163.com/fedora/updates/12/i386/enabled=1gpgcheck=0gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-Fedora file:///etc/pki/rpm-gpg/RPM-GPG-KEY[updates-mirrors.163.com]name=Fedora updatesbaseurl=http://mirrors.163.com/fedora/updates/12/i386/enabled=1gpgcheck=0gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-Fedora file:///etc/pki/rpm-gpg/RPM-GPG-KEY
保存，关闭163.repo
[Fedora-ftp.sjtu.edu.cn]name=Fedora 14 – i386baseurl=http://ftp.sjtu.edu.cn/fedora/linux/releases/14/Fedora/i386/os/enabled=1gpgcheck=0gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora[Everything-ftp.sjtu.edu.cn]name=Everything 14 – i386baseurl=http://ftp.sjtu.edu.cn/fedora/linux/releases/14/Everything/i386/os/enabled=1gpgcheck=0gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora[updates-ftp.sjtu.edu.cn]name=Fedora updatesbaseurl=http://ftp.sjtu.edu.cn/fedora/linux/updates/14/i386/enabled=1gpgcheck=0
然后保存退出。
（参考：国内的两大门户网易和搜狐都有镜像服务器，和。添加他们的源可以看他们的帮助（搜狐用英语），以fedora12为例：添加搜狐源，点击fedora后边的“help”，先下载fedora-sohu.repo和fedora-updates-sohu.repo,放入/etc/yum.repos.d/运行yum makecache生成缓存即可。添加163源，点击fedora后边的“使用帮助“，，下载fedora-163.repo和fedora-updates-163.repo,放入/etc/yum.repos.d/运行yum makecache生成缓存即可。
）四，更新系统：su切换到root用户下，运行 yum update（时间很长）
系统更新完成后应该马上重启电脑，这时就会以新内核登录，在登录后，执行：sudo updatedb命令（或在root用户下执行updatedb），该命令更新系统数据库文件，有时候这个命令很有效，因为系统自动更新数据库文件是每周一次，而有时我们操作很频繁，所有手动更新有很多好处
五，设置sudo命令：
首先，打开终端，获得root环境： su -，并输入root帐户密码。
接着输入: visudo，将会打开一个配置文件，(会使用VI编辑器打开文件，按字母i输入，修改完后按ESC后输入”:wq”退出)
找到root ALL=(ALL) ALL这一行,紧跟此行增加一行
usernameALL=(ALL) ALL
即获得了sudo用户
root环境了。
yum -y install yum-fastestmirror
（此种命令也可：
安装插件yum-fastestmirror
sudoyuminstall yum-fastestmirror
）
己欲立先立人，已欲达先达人。
