在安裝yum的時候發現網上的方法參差不齊，不是很完整，以下是個人親測，同時是總結出的最方便的方法，希望能幫助到大家！

1. 查看已安裝的yum

rpm -qa|grep yum

2. 刪除已有的yum

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

3. 下載以下安裝包

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/下載最新版本

4. 安裝

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

• 到該網站http://mirrors.163.com/.help/centos.html下載配置文件，重命名為CentOS-Base.repo

  • 首先備份/etc/yum.repos.d/CentOS-Base.repo

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

  • 下載對應版本repo文件, 放入/etc/yum.repos.d/(操作前請做好相應備份)

    Centos7

    Centos6

    Centos5

  • 運行以下命令生成緩存

  yum clean all
  yum makecache
  

• 修改配置文件

  • 運行一下命令打開CentOS-Base.repo文件

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

  也可以通過Xftp7軟件編輯，更加方便快捷

  • 將以下配置更換Centos-Base.repo里的內容

  # 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
  

  • 配置完成后更新緩存

  yum clean all
  yum makecache
  

6. 完成以上步驟就可以成功在Linux安裝上yum啦

總結

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