linux操作集-yum安装

需求

centos可以联外网，但yum不可用，我要用yum安装工具，（看清自己的系统哦！）

安装

1. 清楚以前配置

rpm -aq|grep yum|xargs rpm -e --nodeps

2. 进入rpm网站下载rpm包 http://mirrors.163.com/centos/7/os/x86_64/Packages/，注意centos/7/中的6和7根据自己的系统选择，然后下载对应rpm：
   1. yum-.rpm
   2. yum-metadata-parser-.rpm
   3. yum-plugin-fastestmirror-.rpm
   4. python-iniparse-.rpm
   "*"表示选择你自己的版本，如我选择
   image.png

3. 安装YUM

   1. 先安装 python-iniparse-*.rpm
      rpm -ivh python-iniparse-0.4-9.el7.noarch.rpm
   2. 安装其他包
      rpm -ivh yum-*.rpm

4. 安装完成后更新镜像文件

   1. cd /etc/yum.repos.d
   2. 下载镜像 wget http://mirrors.163.com/.help/CentOS7-Base-163.repo
   3. 将文件中的$releasever替换成7 （7是指LINUX版本号）

vi CentOS7-Base-163.repo
#可以用命令:%s/$releasever/7/g替换

 结果：

name=CentOS-$releasever - Base
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os&infra=$infra
#baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

#released updates
[updates]
name=CentOS-$releasever - Updates
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates&infra=$infra
#baseurl=http://mirror.centos.org/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras&infra=$infra
#baseurl=http://mirror.centos.org/centos/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus&infra=$infra
#baseurl=http://mirror.centos.org/centos/$releasever/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

5. 重命名文件
   mv CentOS7-Base-163.repo CentOS7-Base.repo

6. 运行yum makecache 生成缓存

7. 运行yum clean all（等同于 yum cleanheaders ; yum cleanpackages）

8. yum update 更新yum，此时要等待一段时间，更新所有文件

9. 完成

Linux操作集目录 https://www.jianshu.com/p/7839d27c62f8