What is the CLI command to run top or htop or iotop?
Can it be run from console or do I have to enable SSH?
I believe ‘htop’ will work on Debian and it should be able to be done in console,
OK, so HAOS isn’t Debian - sorry, I missed that although I can now see you had it in the title.
Indeedy 
I had it at 2 CPU, noticed today it was running at 50-60% utilization.
I have literally nothing but NUT running.
I disabled all addons, no change.
I rebooted, no change.
I’m at a loss/confused.
Need granular report of PID to figure out further.
Well… installing the SSH/Terminal add-on worked.
Not fond of a workaround, but hey I can look at stuff now.
I have a Debian container (12 IIRC) I could run HA-Core in just to see what’s up with the config.
Have you installed ‘system monitor’?
Run glances in unprotected mode to get a full picture of what’s going on. For me, this always comes down to the haasio_dns container maxing out one or more cores when it can’t phone home. If that’s the case for you, you’ll need to disable fallback dns.
https://community.home-assistant.io/t/high-cpu-load-hassio-dns-container/339584
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Just did, neat history, tho I have it already with XCP-NG so not all that helpful.
Thanks, I will try that!
Thank you!
That was the fix.
ha dns options --fallback=false