su - root
cd /etc/yum.repos.d
mv /etc/yum.repos.d/
mv CentOS-Base.repo CentOS-Base.repo.bak
wget http://mirrors.sohu.com/help/CentOS-Base-sohu.repo
或者
wget http://mirrors.163.com/.help/CentOS6-Base-163.repo
mv CentOS-Base-sohu.repo CentOS-Base.repo
rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY*
更新完yum源后,建议更新一下,使操作立即生效
yum makecache
Loaded plugins: fastestmirrorRepository base is listed more than once in the configurationRepository updates is listed more than once in the configurationRepository extras is listed more than once in the configurationRepository centosplus is listed more than once in the configurationRepository contrib is listed more than once in the configurationLoading mirror speeds from cached hostfile* addons: mirrors.163.com* base: mirror.metrocast.net* extras: mirror.beyondhosting.net* fasttrack: centos.vipernetworksystems.com* updates: centos.vipernetworksystems.comhttp://mirrors.163.com/centos/6/addons/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 404"Trying other mirror.http://mirror.centos.org/centos/6/addons/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 404"Trying other mirror.Error: Cannot retrieve repository metadata (repomd.xml) for repository: addons. Please verify its path and try again
#[addons]#name=CentOS-$releasever - Addons - 163.com#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=addons#baseurl=http://mirrors.163.com/centos/$releasever/addons/$basearch/#gpgcheck=1#pgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5
#[addons]#name=CentOS-$releasever - Addons - sohu.com#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=addons#baseurl=http://mirrors.sohu.com/centos/$releasever/addons/$basearch/#gpgcheck=1#gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5CentOS-Base-sohu.repo
yum upgrade
建议:不需要更新yum源,centos自己会找最近的yum安装