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This command works:

parallel-ssh -i -O 'IdentityFile=control.pem' -l control  -H example.com 'nohup /home/hubot/runHubot.sh' 2>&1

When I log onto my server, ps shows me that the runHubot script is running. However, this command is not backgrounded so it doesn't return to parallel-ssh

The same command, just with a single & appended to nohup doesn't work. Why?

parallel-ssh -i -O 'IdentityFile=control.pem' -l control  -H example.com 'nohup /home/hubot/runHubot.sh &' 2>&1

This command returns to parallel-ssh, but the hubot script isn't in my ps output.

How can I background this process using parallel-ssh (switching to another program is not an option)?

  • Does the second command produce a nohup.out? If yes, what's in it? – ott-- Oct 4 '12 at 16:14
  • no, not creating a nohup.out as far as i can see – andy Oct 4 '12 at 16:26
  • But then there's no nohup.out script created for the first one either... – andy Oct 4 '12 at 16:27
  • Does the script produce any output at all? Can you add an echo something to check. Have you considered using screen? – ott-- Oct 4 '12 at 20:13
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Do you see it in ps -elf or ps aux? ps may only be showing you processes with a terminal.

| improve this answer | |
  • It's not in either, but i normally use ps aux – andy Oct 4 '12 at 16:35

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