[疑问] 兄弟们，yum install是不是镜像都没了？

好像显示大致意思是说镜像地址不存在
Errors during downloading metadata for repository ‘powertools’:
  – Curl error (6): Couldn’t resolve host name for http://mirrorlist.centos.org/?release=8-stream&arch=x86_64&repo=PowerTools&infra=stock [Could not resolve host: mirrorlist.centos.org]
Error: Failed to download metadata for repo ‘powertools’: Cannot prepare internal mirrorlist: Curl error (6): Couldn’t resolve host name for http://mirrorlist.centos.org/?release=8-stream&arch=x86_64&repo=PowerTools&infra=stock [Could not resolve host: mirrorlist.centos.org]

那请教兄弟，我这个安装命令换什么

CentOS 7 已经停止维护了，不建议使用，可以用 AlmaLinux 的脚本升级到 AlmaLinux 8 再升级到 AlmaLinux 9，还可以再战 10 年

https://wiki.almalinux.org/elevate/ELevating-CentOS7-to-AlmaLinux-9.html