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一,卸载旧有yum
rpm -qa|grep yum|xargs rpm -e --nodeps
二、更新文件yum文件
//I386执行以下三条命令:
wget http://centos.ustc.edu.cn/centos/5/os/i386/CentOS/yum-3.2.22-39.el5.centos.noarch.rpm
wget http://centos.ustc.edu.cn/centos/5/os/i386/CentOS/yum-fastestmirror-1.1.16-21.el5.centos.noarch.rpm
wget http://centos.ustc.edu.cn/centos/5/os/i386/CentOS/yum-metadata-parser-1.1.2-3.el5.centos.i386.rpm
//X86_64
wget http://centos.ustc.edu.cn/centos/5/os/x86_64/CentOS/yum-3.2.22-39.el5.centos.noarch.rpm
wget http://centos.ustc.edu.cn/centos/5/os/x86_64/CentOS/yum-fastestmirror-1.1.16-21.el5.centos.noarch.rpm
wget http://centos.ustc.edu.cn/centos/5/os/x86_64/CentOS/yum-metadata-parser-1.1.2-3.el5.centos.x86_64.rpm
三,安装yum,并更新源
rpm -ivh yum-*
wget http://docs.linuxtone.org/soft/lemp/CentOS-Base.repo
vi /etc/yum.repo.d/CentOS-Base.repo
建议编辑,替换操作,输入“:1,$s/mirror.centos.org/mirrors.163.com/g“ 或者直接替换掉对应文件;
四、问题处理:
1,安装过程中出现:warning: rpmts_HdrFromFdno: Header V3 DSA signature: NOKEY, key ID
原因:yum安装了旧版本的GPG keys
解决:下载并更新key
cd /etc/pki/rpm-gpg
wget http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5
rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY*
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