手动配置 Yum 仓库

在我使用虚拟机，系统在尝试访问CentOS的镜像列表时遇到了网络问题，具体表现为无法解析mirrorlist.centos.org

于是手动配置yum仓库

备份现有的 repo 文件

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

创建新的 repo 文件：使用文本编辑器（如 vi 或 nano）创建一个新的 repo 文件 /etc/yum.repos.d/CentOS-Base.repo 并添加以下内容。这里我们使用阿里云的镜像源作为示例

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

按i进入插入模式

[base]
name=CentOS-$releasever - Base
baseurl=https://mirrors.aliyun.com/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7[updates]
name=CentOS-$releasever - Updates
baseurl=https://mirrors.aliyun.com/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7[extras]
name=CentOS-$releasever - Extras
baseurl=https://mirrors.aliyun.com/centos/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7[centosplus]
name=CentOS-$releasever - Plus
baseurl=https://mirrors.aliyun.com/centos/$releasever/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7

先点esc，然后打出:,然后输入wq，回车

清除 Yum 缓存并重新生成缓存