[root@lmap ~]# lsb_release -a

LSB Version:    :core-3.0-ia32:core-3.0-noarch:graphics-3.0-ia32:graphics-3.0-noarch

Distributor ID: RedHatEnterpriseAS

Description:    Red Hat Enterprise Linux AS release 4 (Nahant Update 8)

Release:        4

Codename:       NahantUpdate8

1.下载软件包：

#wget http://v.xok.cc/linux/install/others/yum-2.0.8-1.src.rpm

#rpmbuild --rebuild yum-2.0.8-1.src.rpm

#cd /usr/src/redhat/RPMS/noarch/

# rpm -ivh yum-2.0.8-1.noarch.rpm

二、配置文件部份

#cp /etc/yum.conf /etc/yum.conf.bak

#vim /etc/yum.conf

[main]

cachedir=/var/cache/yum

debuglevel=2

logfile=/var/log/yum.log

pkgpolicy=newest

distroverpkg=redhat-release

tolerant=1

exactarch=1

[base]

name=Red Hat Linux $releasever - $basearch - Base

baseurl= http://centos.ustc.edu.cn/centos/4.8/updates/i386/

[updates]

name=Red Hat Linux $releasever - Updates

baseurl= http://mirrors.163.com/centos/4.8/updates/i386/

[updates]

name=Red Hat Linux $releasever - Updates

baseurl= http://mirror.centos.org/centos/4.8/updates/i386/

三：测试

#yum clean all

#yum list

#yum --version

注：不同的版本，请自行修改baseurl的地址

4.7的url为

http://vault.centos.org/4.7/updates/i386/

4.7下的配置文件为

[main]

cachedir=/var/cache/yum

debuglevel=2

logfile=/var/log/yum.log

pkgpolicy=newest

distroverpkg=redhat-release

tolerant=1

exactarch=1

[base]

name=Red Hat Linux $releasever - $basearch - Base

baseurl= http://vault.centos.org/4.7/updates/i386/

[updates]

name=Red Hat Linux $releasever - Updates

baseurl= http://vault.centos.org/4.7/updates/i386/

[updates]

name=Red Hat Linux $releasever - Updates

baseurl= http://vault.centos.org/4.7/updates/i386/