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The CPU usage is back to normal right now.Log in to SSH, start "top" and monitor CPU usage and see if "log" appears often near the top of the screen.
If high CPU usage and no logs = DDOS
If both = brute force = someone trying to find user passwords using automated software
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We had no brute force for quite a while as the result of that was the influx of existing member accounts being hijacked and used to post spam.
Or also possible, users using stronger passwords so much harder to crack. This is highly likely as nowadays wherever you register there are several warnings to use stronger mixed passwords.
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Maybe install btop, then you can watch a lot more stuff, including network and disk usage. When I learned of btop, I pretty much dropped using top because btop is sorta nice. sudo apt install btop
hope that helps
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surprise
Code:The OS is Welcome to Ubuntu 20.04.6 LTS (GNU/Linux 5.4.0-216-generic x86_64) JT
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