[root@localhost etc]# cd /
[root@localhost /]# cd /etc/yum.repos.d/
[root@localhost yum.repos.d]# wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.cloud.tencent.com/repo/centos8_base.repo
--2024-01-16 15:29:40--  http://mirrors.cloud.tencent.com/repo/centos8_base.repo
正在解析主机 mirrors.cloud.tencent.com (mirrors.cloud.tencent.com)... 222.186.183.149, 60.188.68.132, 60.188.68.223, ...
正在连接 mirrors.cloud.tencent.com (mirrors.cloud.tencent.com)|222.186.183.149|:80... 已连接。
已发出 HTTP 请求，正在等待回应... 200 OK
长度：1792 (1.8K) [application/octet-stream]
正在保存至: “/etc/yum.repos.d/CentOS-Base.repo”

/etc/yum.repos.d/CentOS-B 100%[====================================>]   1.75K  --.-KB/s  用时 0s     

2024-01-16 15:29:41 (184 MB/s) - 已保存 “/etc/yum.repos.d/CentOS-Base.repo” [1792/1792])

[root@localhost yum.repos.d]# yum makecache
Repository extras is listed more than once in the configuration
Repository fasttrack is listed more than once in the configuration
Qcloud centos OS - aarch64                                             8.3 kB/s | 3.9 kB     00:00   
Qcloud centos extras - aarch64                                         4.9 kB/s | 1.5 kB     00:00   
CentOS Linux 8 - AppStream                                             4.8  B/s |  38  B     00:07   
错误：为 repo 'appstream' 下载元数据失败 : Cannot prepare internal mirrorlist: No URLs in mirrorlist
[root@localhost yum.repos.d]# yum makecache
Repository extras is listed more than once in the configuration
Repository fasttrack is listed more than once in the configuration
Qcloud centos OS - aarch64                                                                   12 kB/s | 3.9 kB     00:00   
Qcloud centos extras - aarch64                                                              4.9 kB/s | 1.5 kB     00:00   
CentOS Linux 8 - AppStream                                                                   83  B/s |  38  B     00:00   
错误：为 repo 'appstream' 下载元数据失败 : Cannot prepare internal mirrorlist: No URLs in mirrorlist
[root@localhost yum.repos.d]#