怎么在CentOS7系统中安装yum源

在CentOS 7系统中安装yum源，可以让我们更方便地管理和更新系统软件包，以下是详细的步骤：

准备工作

1、确保你的CentOS 7系统已经安装了基本的软件包，如wget、tar等，如果没有安装，可以使用以下命令进行安装：

sudo yum install y wget tar

2、下载CentOS 7的镜像文件，访问CentOS官方网站（https://www.centos.org/download/）下载最新版本的CentOS 7镜像文件，这里以CentOS 7.9为例，下载x86_64架构的镜像文件。

创建本地yum源

1、将下载好的CentOS 7镜像文件上传到服务器的一个目录，例如/opt，使用wget命令下载镜像文件：

sudo wget https://centos7.iuscommunity.org/iusrelease.rpm
sudo wget https://centos7.iuscommunity.org/iusreleasex86_647.9.20093.el7.ius.aarch64.rpm
sudo wget https://centos7.iuscommunity.org/centos/7/os/x86_64/Packages/centoslinuxrepos79.20093.el7.ius.aarch64.rpm
sudo wget https://centos7.iuscommunity.org/centos/7/os/x86_64/Packages/centosgpgkeys79.20093.el7.ius.aarch64.rpm

2、安装iusrelease和centosgpgkeys包：

sudo rpm ivh iusrelease* centosgpgkeys*

3、将下载好的CentOS 7镜像文件上传到服务器的一个目录，例如/opt，使用wget命令下载镜像文件：

sudo wget https://centos7.iuscommunity.org/iusrelease.rpm
sudo wget https://centos7.iuscommunity.org/iusreleasex86_647.9.20093.el7.ius.aarch64.rpm
sudo wget https://centos7.iuscommunity.org/centos/7/os/x86_64/Packages/centoslinuxrepos79.20093.el7.ius.aarch64.rpm
sudo wget https://centos7.iuscommunity.org/centos/7/os/x86_64/Packages/centosgpgkeys79.20093.el7.ius.aarch64.rpm

2、安装iusrelease和centosgpgkeys包：

sudo rpm ivh iusrelease* centosgpgkeys*

3、将下载好的CentOS 7镜像文件上传到服务器的一个目录，例如/opt，使用wget命令下载镜像文件：

sudo wget https://centos7.iuscommunity.org/iusrelease.rpm
sudo wget https://centos7.iuscommunity.org/iusreleasex86_647.9.20093.el7.ius.aarch64.rpm
sudo wget https://centos7.iuscommunity.org/centos/7/os/x86_64/Packages/centoslinuxrepos79.20093.el7.ius.aarch64.rpm
sudo wget https://centos7.iuscommunity.org/centos/7/os/x86_64/Packages/centosgpgkeys79.20093.el7.ius.aarch64.rpm

2、安装iusrelease和centosgpgkeys包：

sudo rpm ivh iusrelease* centosgpgkeys*

配置本地yum源

1、创建一个名为localrepo的目录，用于存放本地yum源的文件：

sudo mkdir /etc/yum.repos.d/localrepo

2、将下载好的CentOS 7镜像文件解压到localrepo目录：

sudo tar zxvf centoslinuxrepos79* C /etc/yum.repos.d/localrepo strip=1

3、修改localrepo目录下的CentOSBase.repo文件，将baseurl和mirrorlist指向本地镜像文件的位置：

[base]
name=CentOS Linux ($releasever) Base mirrors.ustc.edu.cn
#baseurl=http://mirrors.ustc.edu.cn/centos/$releasever/os/$basearch/
#mirrorlist=http://mirrors.ustc.edu.cn/centos/$releasever/os/$basearch/mirrorlist?repo=os&arch=$basearch&lang=zh_CN&release=$releasever&contenttype=text/plain&id=baseurl&dist=centos&group_id=base&extra=%252Fos%252F$basearch%252F&filename=baseurl%5Fcontents%5F$releasever%5F$basearch%5Fbaseurl%5Fcontents%5Ffilelist%5Fbaseurl%5Fcontents%5Ffilelist%5Fbaseurl%5Fcontents%5Ffilelist%5Fbaseurl%5Fcontents%5Ffilelist%5Fbaseurl%5Fcontents%5Ffilelist%5Fbaseurl%5Fcontents%5Ffilelist%5Fbaseurl%5Fcontents%5Ffilelist%5Fbaseurl%5Fcontents%5Ffilelist%5Fbaseurl%5Fcontents%5Ffilelist%5Fbaseurl%5Fcontents%5Ffilelist%5Fbaseurl%5Fcontents%5Ffilelist%5Fbaseurl%5Fcontents%5Ffilelist%5Fbaseurl%5Fcontents%5Ffilelist%5Fbaseurl%5Fcontents%5Ffilelist%5Fbaseurl%5Fcontents%5Ffilelist%5Fbaseurl%5Fcontents%5Ffilelist%5Fbaseurl%5Fcontents%5Ffilelist%5Fbaseurl%5Fcontents%5Ffilelist%5Fbaseurl%5Fcontents%5Ffilelist%5Fbaseurl%5Fcontents%5Ffilelist%5Fbaseurl%5Fcontents%5Ffilelist%5Fbaseurl%5Fcontents%5Ffilelist%5Fbaseurl%5Fcontents%5Ffilelist%5Fbaseurl