ssh connection reuse breaks -f (background launch), why?

Asked Aug 09 '22 at 00:32

Active Aug 09 '22 at 00:33

Viewed 20 times

When not using connection sharing the following will return immediately after launching a remote sleep process:

$ ssh -f host "nohup sleep 10"

However if I specify that I want to use connection sharing in ~/.ssh/config like this:

host *
  ControlMaster auto
  ControlPath ~/.ssh/ssh_mux_%h_%p_%r

The same command will block for 10 seconds until the sleep exits. Why is this?

edited Aug 09 '22 at 00:33

asked Aug 09 '22 at 00:32

samwise

From what I can tel this is a bug in ssh. I was able to work around this by using: ```ssh host "nohup sleep 10 /dev/null 2>/dev/null &"``` – samwise Aug 09 '22 at 14:50
You could add `-t` to command^ `$ ssh -t -f host "nohup sleep 10"` – Alexander Tolkachev Aug 09 '22 at 19:29

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