把下面四个文件放到/etc/yum.repos.d目录下
dag.repo：
[dag] name=Dag RPM Repository for RHEL5 baseurl=http://mirrors.ustc.edu.cn/centos/5/os/x86_64/ enabled=1 gpgcheck=1 gpgkey=http://mirrors.ustc.edu.cn/centos/5/os/x86_64/RPM-GPG-KEY-CentOS-5
mirrors-rpmforge：
http://apt.sw.be/redhat/el5/en/$ARCH/dag http://archive.cs.uu.nl/mirror/dag.wieers/redhat/el5/en/$ARCH/dag http://ftp2.lcpe.uni-sofia.bg/freshrpms/pub/dag/redhat/el5/en/$ARCH/dag #http://ftp.heanet.ie/pub/freshrpms/pub/dag/redhat/el5/en/$ARCH/dag http://ftp-stud.fht-esslingen.de/dag/redhat/el5/en/$ARCH/dag http://mirror.cpsc.ucalgary.ca/mirror/dag/redhat/el5/en/$ARCH/dag http://mirrors.ircam.fr/pub/dag/redhat/el5/en/$ARCH/dag http://rh-mirror.linux.iastate.edu/pub/dag/redhat/el5/en/$ARCH/dag http://rpmfind.net/linux/dag/redhat/el5/en/$ARCH/dag http://wftp.tu-chemnitz.de/pub/linux/dag/redhat/el5/en/$ARCH/dag http://www.mirrorservice.org/sites/apt.sw.be/redhat/el5/en/$ARCH/dag
rhel-debuginfo.repo：
[base] name=CentOS-5 - Base #mirrorlist=http://mirrorlist.centos.org/?release=$releasever5&arch=$basearch& repo=os #baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/ baseurl=http://ftp.sjtu.edu.cn/centos/5/os/$basearch/ gpgcheck=1 gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos5 #released updates [update] name=CentOS-5 - Updates #mirrorlist=http://mirrorlist.centos.org/?release=4&arch=$basearch&repo=updates baseurl=http://ftp.sjtu.edu.cn/centos/5/updates/$basearch/ gpgcheck=1 gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos5 #packages used/produced in the build but not released [addons] name=CentOS-5 - Addons #mirrorlist=http://mirrorlist.centos.org/?release=4&arch=$basearch&repo=addons baseurl=http://ftp.sjtu.edu.cn/centos/5/addons/$basearch/ gpgcheck=1 gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos5 #additional packages that may be useful [extras] name=CentOS-5 - Extras #mirrorlist=http://mirrorlist.centos.org/?release=4&arch=$basearch&repo=extras baseurl=http://ftp.sjtu.edu.cn/centos/5/extras/$basearch/ gpgcheck=1 gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos5 #additional packages that extend functionality of existing packages [centosplus] name=CentOS-5 - Plus #mirrorlist=http://mirrorlist.centos.org/?release=4&arch=$basearch&repo=centosplus baseurl=http://ftp.sjtu.edu.cn/centos/5/centosplus/$basearch/ gpgcheck=1 enabled=0 gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos5 #contrib - packages by Centos Users [contrib] name=CentOS-5 - Contrib #mirrorlist=http://mirrorlist.centos.org/?release=4&arch=$basearch&repo=contrib baseurl=http://ftp.sjtu.edu.cn/centos/5/contrib/$basearch/ gpgcheck=1 enabled=0 gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos5 # vi dag.repo [dag] name=Dag RPM Repository for RHEL5 baseurl=http://ftp.riken.jp/Linux/dag/redhat/el5/en/$basearch/dag/ enabled=1 gpgcheck=1 gpgkey=http://ftp.riken.jp/Linux/dag/packages/RPM-GPG-KEY.dag.txt
rpmforge.repo：
# Name: RPMforge RPM Repository for Red Hat Enterprise 5 - dag # URL: http://rpmforge.net/ [rpmforge] name = Red Hat Enterprise $releasever - RPMforge.net - dag #baseurl = http://apt.sw.be/redhat/el5/en/$basearch/dag mirrorlist = http://apt.sw.be/redhat/el5/en/mirrors-rpmforge #mirrorlist = file:///etc/yum.repos.d/mirrors-rpmforge enabled = 1 protect = 0 gpgkey = file:///etc/pki/rpm-gpg/RPM-GPG-KEY-rpmforge-dag gpgcheck = 1
设置了DNS不生效，悲剧
如果你的服务器需要DNS，请在/etc/hosts中增加以下设置，有更好的方法请告知我。
202.141.160.110 centos.ustc.edu.cn 202.141.160.110 mirrors.ustc.edu.cn 202.38.97.230 ftp.sjtu.edu.cn 193.1.193.67 apt.sw.be 129.143.116.10 mirror1.hs-esslingen.de 78.41.71.17 be.mirror.eurid.eu 136.159.12.11 mirror.cpsc.ucalgary.ca 147.251.48.205 ftp.fi.muni.cz 123.129.254.17 repository.vsb.cz 147.229.176.19 merlin.fit.vutbr.cz 195.220.108.108 fr2.rpmfind.net 5.83.232.126 mir01.syntis.net 160.45.254.24 mirror.atrpms.net 37.58.58.140 mirror.de.leaseweb.net 193.1.193.64 ftp.heanet.ie 134.226.112.13 thammuz.tchpc.tcd.ie 122.213.199.121 mirror.fairway.ne.jp 134.160.38.1 ftp.riken.jp 203.217.178.196 mirror.oscc.org.my 94.75.223.121 mirror.nl.leaseweb.net 131.211.32.146 archive.cs.uu.nl 83.166.201.99 ftp.lug.ro 91.190.113.114 mirror.awanti.com 196.4.160.12 ftp.is.co.za 212.219.56.184 www.mirrorservice.org 72.88.94.11 repoforge.spinellicreations.com 207.223.121.100 mirror.teklinks.com 134.173.34.196 mirror.hmc.edu 129.21.171.72 mirror.rit.edu 130.117.72.247 nl.mirror.eurid.eu 108.59.10.97 mirror.us.leaseweb.net 118.69.250.132 mirror-fpt-telecom.fpt.net