Question

50

Run a nohup command over SSH, then disconnect

rated 0 times [ 50] [ 0] / answers: 1 / hits: 209136 / 2 Years ago, thu, june 23, 2022, 7:05:35

I want to execute a script, start.sh on a remote server which runs this:

nohup node server.js &

Naively, I call SSH like this:

ssh myserver <<EOF

./start.sh &

EOF

This starts the script, but leaves the session connected. I want to follow this step with other commands in a script, so that's no good.

How can I SSH to the remote machine, launch a nohup command into the background, then disconnect? I suppose I could put the SSH process itself into the background, but that doesn't seem right.

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ousear

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3 Years ago

answered 2 Years ago ibuteking · Accepted Answer

You have already found the right way, here document.

NOTE: you can put the ssh (client) into background by placing a & at the end, but you will not see the output. If you really want to do this, redirect the stdout/stderr to a file in case you need to check the response from the remote host.

Basically you can do it in either way:

Directly run the command{,s}

ssh user@host "nohup command1 > /dev/null 2>&1 &; nohup command2; command3"

OR

ssh user@host "$(nohup command1 > /dev/null 2>&1 &) && nohup command2 >> /path/to/log 2>&1 &"

NOTE: && requires the first command to return 0 before executing the second

Use Here document

ssh user@host << EOF

nohup command1 > /dev/null 2>&1 &

nohup command2 >> /path/to/command2.log 2>&1 &

......

EOF

The above 3 options should work for you.

In addition, take a look at the answer here: https://askubuntu.com/a/348921/70270