The cli.

I have used management interfaces like coxkpit in the last but i do not really like it that much. I have E-Mail Notifications setup for updates via aptitude and monitor using prometheus and grafana and get additional notifications via prometheus alarm manager.

For an easy to use docker interface i use dockge, since i found it in this use case to be faster with a good, working, independend Interface.

But for the Linux underneath, for all 10-20 servers i managae, CLI.