1.下载所需要的rpm安装包
wget https://mirrors.aliyun.com/centos/7/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm wget https://mirrors.aliyun.com/centos/7/os/x86_64/Packages/yum-3.4.3-161.el7.centos.noarch.rpm wget https://mirrors.aliyun.com/centos/7/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-50.el7.noarch.rpm wget https://mirrors.aliyun.com/centos/7/os/x86_64/Packages/yum-utils-1.1.31-50.el7.noarch.rpm wget https://mirrors.aliyun.com/centos/7/os/x86_64/Packages/python-urlgrabber-3.10-9.el7.noarch.rpm
百度网盘
https://pan.baidu.com/s/1P9EToKn2JvUeFpvbJxz1Qg 提取码:to04
2.查询yum包和删除yum现有rpm包,删完以后再查看一下,是否删除干净,删除完成后安装刚刚下载好的rpm包,yum包安装时必须取消依赖关系和强制安装
rpm -qa | grep yum rpm -qa | grep yum | xargs rpm -e --nodeps rpm -ivh python-urlgrabber-3.10-9.el7.noarch.rpm rpm -ivh yum-* --force --nodeps
3.在/etc/yum.repos.d目录下创建Centos-7.repo
cd /etc/yum.repos.d
vi Centos-7.repo
内容为:
# CentOS-Base.repo # # The mirror system uses the connecting IP address of the client and the # update status of each mirror to pick mirrors that are updated to and # geographically close to the client. You should use this for CentOS updates # unless you are manually picking other mirrors. # # If the mirrorlist= does not work for you, as a fall back you can try the # remarked out baseurl= line instead. # # [base] name=CentOS-7 - Base - mirrors.aliyun.com failovermethod=priority baseurl=http://mirrors.aliyun.com/centos/7/os/$basearch/ http://mirrors.aliyuncs.com/centos/7/os/$basearch/ http://mirrors.cloud.aliyuncs.com/centos/7/os/$basearch/ gpgcheck=1 gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7 #released updates [updates] name=CentOS-7 - Updates - mirrors.aliyun.com failovermethod=priority baseurl=http://mirrors.aliyun.com/centos/7/updates/$basearch/ http://mirrors.aliyuncs.com/centos/7/updates/$basearch/ http://mirrors.cloud.aliyuncs.com/centos/7/updates/$basearch/ gpgcheck=1 gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7 #additional packages that may be useful [extras] name=CentOS-7 - Extras - mirrors.aliyun.com failovermethod=priority baseurl=http://mirrors.aliyun.com/centos/7/extras/$basearch/ http://mirrors.aliyuncs.com/centos/7/extras/$basearch/ http://mirrors.cloud.aliyuncs.com/centos/7/extras/$basearch/ gpgcheck=1 gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7 #additional packages that extend functionality of existing packages [centosplus] name=CentOS-7 - Plus - mirrors.aliyun.com failovermethod=priority baseurl=http://mirrors.aliyun.com/centos/7/centosplus/$basearch/ http://mirrors.aliyuncs.com/centos/7/centosplus/$basearch/ http://mirrors.cloud.aliyuncs.com/centos/7/centosplus/$basearch/ gpgcheck=1 enabled=0 gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7 #contrib - packages by Centos Users [contrib] name=CentOS-7 - Contrib - mirrors.aliyun.com failovermethod=priority baseurl=http://mirrors.aliyun.com/centos/7/contrib/$basearch/ http://mirrors.aliyuncs.com/centos/7/contrib/$basearch/ http://mirrors.cloud.aliyuncs.com/centos/7/contrib/$basearch/ gpgcheck=1 enabled=0 gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
5.运行以下命令
yum clean all
yum makecache