Centos下安装yum（完整教程）

大家好，又见面了，我是你们的朋友全栈君。

在安装yum的时候发现网上的方法参差不齐，不是很完整，以下是个人亲测，同时是总结出的最方便的方法，希望能帮助到大家！

1. 查看已安装的yum

rpm -qa|grep yum

2. 删除已有的yum

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

3. 下载以下安装包

wget http://tel.mirrors.163.com/centos/7/os/x86_64/Packages/python-2.7.5-89.el7.x86_64.rpm 

wget http://tel.mirrors.163.com/centos/7/os/x86_64/Packages/python-iniparse-0.4-9.el7.noarch.rpm 

wget http://tel.mirrors.163.com/centos/7/os/x86_64/Packages/yum-3.4.3-168.el7.centos.noarch.rpm

wget http://tel.mirrors.163.com/centos/7/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm

wget http://tel.mirrors.163.com/centos/7/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-54.el7_8.noarch.rpm

如果找不到以上版本，可以到http://tel.mirrors.163.com/centos/7/os/x86_64/Packages/下载最新版本

4. 安装

rpm -ivh python-2.7.5-89.el7.x86_64.rpm python-iniparse-0.4-9.el7.noarch.rpm --nodeps --force

rpm -ivh yum-metadata-parser-1.1.4-10.el7.x86_64.rpm --nodeps --force

rpm -ivh yum-3.4.3-168.el7.centos.noarch.rpm yum-plugin-fastestmirror-1.1.31-54.el7_8.noarch.rpm --nodeps --force

5. 更改yum源

• 到该网站http://mirrors.163.com/.help/centos.html下载配置文件，重命名为CentOS-Base.repo

  • 首先备份/etc/yum.repos.d/CentOS-Base.repo

    mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
    

  • 下载对应版本repo文件, 放入/etc/yum.repos.d/(操作前请做好相应备份)

    Centos7

    Centos6

    Centos5

  • 运行以下命令生成缓存

  yum clean all
  yum makecache
  

• 修改配置文件

  • 运行一下命令打开CentOS-Base.repo文件

  cd /etc/yum.repos.d 
  
  vim CentOS-Base.repo
  

  也可以通过Xftp7软件编辑，更加方便快捷

  • 将以下配置更换Centos-Base.repo里的内容

  # 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-$releasever - Base
  #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
  baseurl=https://mirrors.ustc.edu.cn/centos/$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=$basearch&repo=updates
  baseurl=https://mirrors.ustc.edu.cn/centos/$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=$basearch&repo=extras
  baseurl=https://mirrors.ustc.edu.cn/centos/$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=$basearch&repo=centosplus
  baseurl=https://mirrors.ustc.edu.cn/centos/$releasever/centosplus/$basearch/
  gpgcheck=1
  enabled=0
  gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
  

  • 配置完成后更新缓存

  yum clean all
  yum makecache
  

6. 完成以上步骤就可以成功在Linux安装上yum啦