Running services, network usage, memory usage, bandwidth, disk I/O, successful logins, whether the thing is even alive, etc…
So far my only method has been “hope and pray”.
Running services, network usage, memory usage, bandwidth, disk I/O, successful logins, whether the thing is even alive, etc…
So far my only method has been “hope and pray”.
Yes, it can be a bit involved. I’d say I can spin up a mail server in 1–2 days though provided the OS is already installed and I have a domain name and port 25 isn’t blocked (that’s the main one that tends to be blocked). It may take longer for people who aren’t familiar with mail servers but it’s not some huge operation.
You can just try spinning up a mail server for fun. If it goes badly then just don’t move over your dentist appointments to it. It’s only critical infra if you use it for critical things, which you probably shouldn’t till it’s stable.