1.由于yum不能使用,无法安装gcc，需要配置yum源

2.删除原来的/etc/yum.conf文件和/etc/yum.repo.d目录

rm -rf /etc/yum.conf

rm -rf /etc/yum.repos.d/rhel-debuginfo.repo

3.重新配置yum.conf

vi /etc/yum.conf

[main]

cachedir=/var/cache/yum

keepcache=1

debuglevel=2

logfile=/var/log/yum.log

pkgpolicy=newest

distroverpkg=redhat-release

tolerant=1

exactarch=1

obsoletes=1

gpgcheck=1

plugins=1

metadata_expire=1800

# PUT YOUR REPOS HERE OR IN separate files named file.repo

# in /etc/yum.repos.d

[base]

name=centos-5 - Base

baseurl=http://centos.ustc.edu.cn/centos/5/os/i386/

# the other site: http://centos.candishosting.com.cn/centos/5/os/i386/

# you can find more site in: http://www.centos.org/modules/tinycontent/index.php?id=13

enabled=1

gpgcheck=1

gpgkey=http://centos.ustc.edu.cn/centos/5/os/i386/RPM-GPG-KEY-CentOS-5

#released updates

[update]

name=CentOS-5 - Updates

baseurl=http://mirror.centos.org/centos/5/updates/i386/

gpgcheck=1

gpgkey=http://centos.ustc.edu.cn/centos/5/os/i386/RPM-GPG-KEY-CentOS-5

#packages used/produced in the build but not released

[addons]

name=CentOS-5 - Addons

baseurl=http://mirror.centos.org/centos/5/addons/$basearch/

gpgcheck=1

gpgkey=http://centos.ustc.edu.cn/centos/5/os/i386/RPM-GPG-KEY-CentOS-5

#additional packages that may be useful

[extras]

name=CentOS-5 - Extras

baseurl=http://mirror.centos.org/centos/5/extras/$basearch/

gpgcheck=1

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos4

#additional packages that extend functionality of existing packages

[centosplus]

name=CentOS-5 - Plus

baseurl=http://mirror.centos.org/centos/5/centosplus/$basearch/

gpgcheck=1

enabled=0

gpgkey=http://centos.ustc.edu.cn/centos/5/os/i386/RPM-GPG-KEY-CentOS-5

#contrib - packages by Centos Users

[contrib]

name=CentOS-5 - Contrib

baseurl=http://mirror.centos.org/centos/5/contrib/$basearch/

gpgcheck=1

enabled=0

gpgkey=http://centos.ustc.edu.cn/centos/5/os/i386/RPM-GPG-KEY-CentOS-5

#packages in testing

[testing]

name=CentOS-5 - Testing

baseurl=http://mirror.centos.org/centos/5/testing/$basearch/

gpgcheck=1

enabled=0

gpgkey=http://centos.ustc.edu.cn/centos/5/os/i386/RPM-GPG-KEY-CentOS-5

4.然后测试安装就可以了

yum clean all

yum list

yum -y install gcc gcc-g++

本文出自 “卡卡西” 博客，请务必保留此出处http://whnba.blog.51cto.com/1215711/1604708

Redhat 5.8 配置yum源