矛盾网

arbor找到的很快的国内yum 源：
CentOS USTC mirror

http://centos.ustc.edu.cn/centos/

安装后请按照以下步骤修改CenOS-Base.repo,以后就可以方便的用yum安装软件了.

cd /etc/yum.repos.d
mv CentOS-Base.repo  CentOS-Base.repo.save
wget http://centos.ustc.edu.cn/CentOS-Base.repo

修改以上文件后, 如需要安装gcc, 直接yum install gcc就可以了

还有：
http://www.shlug.org/  
http://mirror.be10.com/

又找到一个：http://mirrors.ta139.com/CentOS-Base.repo.ta139
文章出处：http://www.diybl.com/course/6_system/linux/Linuxjs/20081213/153625.html

    CentOS Linux 是一个依 GPL 规范,及利用 RedHat Enterprise Linux (RHEL) 的源代码 (source code) 来重新编译 (compile) 的 Linux 版本.
CentOS 提供和 RHEL 的 Binary 档案几乎百分之百兼容性,相同的版本 (Release) 和维护 (Maintainence) 更新时间.和 RedHat Enterprise Linux (RHEL) 不同的是,CentOS 依 GPL 的规范,移除了 RedHat 品牌及图片.

下载地址：http://mirrors.kernel.org/centos/5.2/isos/i386/
DVD地址：http://mirrors.kernel.org/centos/5.2/isos/i386/CentOS-5.2-i386-bin-DVD.iso

md5sum:

57fe443676f3aa3965f44f6aae1340a6  CentOS-5.2-i386-bin-1of6.iso
c5d2ed6e3d857332efdf82b58cf247d2  CentOS-5.2-i386-bin-2of6.iso
aca92b87bf1c4b96300b01dd2534c74d  CentOS-5.2-i386-bin-3of6.iso
726d888cae17743a778e7a136f5fd231  CentOS-5.2-i386-bin-4of6.iso
de6f7ef6cf1015c7647cd35ec2826a1a  CentOS-5.2-i386-bin-5of6.iso
8dcd7918757361a865cc35bf126fd2c4  CentOS-5.2-i386-bin-6of6.iso
1539bad48e984ae1441052dc074c0995  CentOS-5.2-i386-bin-DVD.iso
bf39f9b8262ebac876267b46e35bf2dd  CentOS-5.2-i386-netinstall.iso

sha1sum:

9e8da103db2217f10e07b0387edce09395723cbf  CentOS-5.2-i386-bin-1of6.iso
e9d0a51d638caf1ed3adde834672d0f6a82cfd92  CentOS-5.2-i386-bin-2of6.iso
1c120526624e0dda4800abc5548e88937b12aabb  CentOS-5.2-i386-bin-3of6.iso
d774cf3bf6a28007e94969eea9dda44b95a5c249  CentOS-5.2-i386-bin-4of6.iso
c4a94ebf2636e4868c2f72945dabe4a27c3f8301  CentOS-5.2-i386-bin-5of6.iso
0dc6131171739709722e6c0a53953484f7940aec  CentOS-5.2-i386-bin-6of6.iso
c89db7f5294465d593e7b02c232e0e9070111487  CentOS-5.2-i386-bin-DVD.iso
30e212aacb1980445f2d9e683c1d18ddb02d0974  CentOS-5.2-i386-netinstall.iso

md5与hash软件

hash sha1 md5验证软件