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Recently my computer turned on unexpectedly. It is configured to respond to WOL (Wake-On-LAN) but at that time I didn't send any magic packet. It came on out of nowhere.

How can I figure out why it turned on? I already looked at journalctl -b and grepped through various logfiles below /var/log but couldn't find any hint.

PerlDuck
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    Is your BIOS configured to boot after lost power is restored? – user535733 Apr 15 '18 at 13:17
  • @user535733 Good point. I don't think so. At least I didn't change anything recently. Right now I cannot verify (because it's my office computer). I'll check tomorrow. – PerlDuck Apr 15 '18 at 13:21
  • If it's an office computer, it's likely that your IT dept woke it to perform a Windows update, or perform a network survey. – heynnema Apr 15 '18 at 15:50
  • @heynnema Also a valid point. I can check that with them but I doubt it. We are in the luxurious situation that the IT dept doesn't bother our computers if we don't ask them to. – PerlDuck Apr 15 '18 at 16:07
  • Any chance you were experimenting with shutdown that automatically boots up at specific time?: https://askubuntu.com/questions/83685/scheduling-startup-and-shutdown?utm_medium=organic&utm_source=google_rich_qa&utm_campaign=google_rich_qa – WinEunuuchs2Unix Apr 15 '18 at 17:37
  • To find out how you shut down last, use: journalctl -b-1. – WinEunuuchs2Unix Apr 15 '18 at 18:15

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