在 CentOS 7 上配置中国源

在 CentOS 7 上配置中国源（镜像）来加快软件包下载速度的步骤：

更改 CentOS 7 的镜像源为中国镜像

1. 备份原始的仓库配置

在修改之前，建议备份当前的仓库配置文件：

sudo cp /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak

2. 编辑仓库配置

打开仓库配置文件进行编辑：

sudo vi /etc/yum.repos.d/CentOS-Base.repo

3. 将文件内容替换为以下中国镜像的配置：

阿里云 (Aliyun)

[base]
name=CentOS-$releasever - Base - mirrors.aliyun.com
baseurl=http://mirrors.aliyun.com/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=http://mirrors.aliyun.com/centos/$releasever/updates/$basearch/repodata/repomd.xml.key[updates]
name=CentOS-$releasever - Updates - mirrors.aliyun.com
baseurl=http://mirrors.aliyun.com/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=http://mirrors.aliyun.com/centos/$releasever/updates/$basearch/repodata/repomd.xml.key[extras]
name=CentOS-$releasever - Extras - mirrors.aliyun.com
baseurl=http://mirrors.aliyun.com/centos/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=http://mirrors.aliyun.com/centos/$releasever/extras/$basearch/repodata/repomd.xml.key

163 镜像 (163.com)

[base]
name=CentOS-$releasever - Base - mirrors.163.com
baseurl=http://mirrors.163.com/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/$releasever/updates/$basearch/repodata/repomd.xml.key[updates]
name=CentOS-$releasever - Updates - mirrors.163.com
baseurl=http://mirrors.163.com/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/$releasever/updates/$basearch/repodata/repomd.xml.key[extras]
name=CentOS-$releasever - Extras - mirrors.163.com
baseurl=http://mirrors.163.com/centos/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/$releasever/extras/$basearch/repodata/repomd.xml.key

清华大学镜像 (Tsinghua University)

[base]
name=CentOS-$releasever - Base - mirrors.tuna.tsinghua.edu.cn
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/updates/$basearch/repodata/repomd.xml.key[updates]
name=CentOS-$releasever - Updates - mirrors.tuna.tsinghua.edu.cn
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/updates/$basearch/repodata/repomd.xml.key[extras]
name=CentOS-$releasever - Extras - mirrors.tuna.tsinghua.edu.cn
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/extras/$basearch/repodata/repomd.xml.key

保存并关闭文件。

3. 清除 YUM 缓存

清除 YUM 缓存，以确保使用更新后的仓库配置：

sudo yum clean all

4. 更新 YUM 仓库

更新仓库元数据：

sudo yum makecache

5. 验证新的仓库配置

检查已启用的仓库列表，以确认更改：

yum repolist

这将帮助你将 CentOS 7 配置为使用更快的中国镜像源，从而提高软件包的下载速度。