yum

更换YUM源

备份

cp /etc/yum.repos.d/*.repo /etc/yum.repos.d/backup/

删除原有YUM仓库文件

rm -rf /etc/yum.repos.d/CentOS-Base.repo

创建新的YUM源文件

使用文本编辑器（如vi, vim或nano）创建新的YUM源文件

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

添加YUM源配置

阿里云的源

[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/RPM-GPG-Key-CentOS7
 
[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/RPM-GPG-Key-CentOS7
 
[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/RPM-GPG-Key-CentOS7
 
[centos-plus]
name=CentOS-$releasever - Plus - mirrors.aliyun.com
baseurl=http://mirrors.aliyun.com/centos/$releasever/centosplus/$basearch/
gpgcheck=1
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-Key-CentOS7

华为云的源

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

保存文件并退出

按Esc键，然后输入:wq保存并退出

验证YUM源是否更换成功

yum clean all

重新生成YUM缓存：

yum makecache

验证YUM源是否更换成功：可以通过运行以下命令检查当前YUM源状态。

yum repolist

您应该会看到使用的新源的名称以及可用的包数量。

安装常用软件

yum install wget -y
yum install curl -y
yum install git -y