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I was trying to logout previous logged-in root sessions, and stupidly, I typed skill -STOP -u root

Now, I can't ssh back into the server. How do I recover?

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Call the datacenter support, probably? – Mehrdad Jan 30 '10 at 18:50
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move to serverfault? – Nicolás Jan 30 '10 at 18:51
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If there is no non-root process from which you can su then the sure way would be to reboot the machine. – che Jan 30 '10 at 18:52
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I suggest you reboot and watch console. I've often configured servers with a serial connection and a non-root login that I know i can su from. I also give root login permissions to /dev/ttyS1, in case something removed the alternate account. – memnoch_proxy Jan 31 '10 at 6:11
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2 Answers

up vote 3 down vote accepted

If this is a physical box then you'll need some form of lights-out or a nice person to bounce it face-to-face.

If it's virtual then you or someone else needs to deal with it via whatever management console you or they have.

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If you were lucky enough to already be logged in (not as root), you could sudo or su and make it right. Otherwise, you are S.O.L. without a reset switch.

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