【文件属性】：
文件名称：centos7 本地yum源配置
文件大小：2KB
文件格式：TXT
更新时间：2020-12-24 10:08:00
yum
1.查看系统本身存在的版本
rpm -qa | grep yum
2.卸载centos7上存在的yum安装源包
rpm -e 源包 --nodeps
3.下载yum源包（http://mirrors.163.com/centos/7/os/x86_64/Packages/）
yum-metadata-parser-1.1.4-10.el7.x86_64
PackageKit-yum-1.0.7-6.el7.centos.x86_64
yum-utils-1.1.31-40.el7.noarch
下方两个一起装
yum-plugin-fastestmirror-1.1.31-40.el7.noarch yum-langpacks-0.4.2-7.el7.noarch
yum-3.4.3-150.el7.centos.noarch
yum-rhn-plugin-2.0.1-6.el7.noarch
4.安装yum源包
rpm -ivh yum*
5.创建配置文件（/etc/yum.repos.d/CentOS-Base.repo）
vi /etc/yum.repos.d/CentOS-Base.repo
[base]
name=CentOS-$releasever - Base - 163.com
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch;=$basearch&repo=os
baseurl=http://mirrors.163.com/centos/（系统版本号）7/os/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7
#released updates
[updates]
name=CentOS-$releasever - Updates - 163.com
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch;=$basearch&repo=updates
baseurl=http://mirrors.163.com/centos/7/updates/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7
#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras - 163.com
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch;=$basearch&repo=extras
baseurl=http://mirrors.163.com/centos/7/extras/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7
#additional packages that extend functionality of existing packages
[centosplus]
name=$releasever - Plus - 163.com
baseurl=http://mirrors.163.com/centos/7/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7
每一个baseurl的centos后都改成自己系统的版本号
6.执行命令
yum clean all
yum makecache
yum install telnet