Running a Python job remotely with ssh---how can I log out?

Question

I am running a Python script filename.py via ssh. Once I'm logged into the remote machine, I run:

python filename.py &

However, when I close out of the terminal, it appears the python stops running. Why is this? I thought an ampersand & at the end of a statement meant the program kept running?

Possible duplicate of [Linux: Prevent a background process from being stopped after closing SSH client](http://stackoverflow.com/questions/285015/linux-prevent-a-background-process-from-being-stopped-after-closing-ssh-client) — tripleee, Feb 14 '16 at 18:09

Alex Woolford · Accepted Answer · 2016-02-14T17:33:44.480

6

Use nohup:

nohup python filename.py &

nohup [command] & will run the job in the background and return you back to the shell.

edited Feb 14 '16 at 17:33

answered Feb 14 '16 at 17:30

Alex Woolford

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Additional info, [nohup is a POSIX command to ignore the HUP (hangup) signal. The HUP signal is, by convention, the way a terminal warns dependent processes of logout.](https://en.wikipedia.org/wiki/Nohup) – Joachim Isaksson Feb 14 '16 at 17:31
I get the following response after running this command: `$ nohup: ignoring input and appending output to nohup.out` – ShanZhengYang Feb 14 '16 at 17:49
The output from `nohup`, by default, gets written to a file called `nohup.out`. If you want to watch it run, you can `tail -f nohup.out`. – Alex Woolford Feb 14 '16 at 17:54
@AlexWoolford Thanks – ShanZhengYang Feb 14 '16 at 18:17

score 2 · Answer 2 · answered Feb 14 '16 at 17:33

I am not so far into python in shell, but you can use screen in ssh related enviroments

For example:

sudo apt-get install screen

screen -m

This will create virual tty (pty)

Then run your program

python prog.py &

Hope it will work fine for you, have a nice day!

Running a Python job remotely with ssh---how can I log out?

2 Answers2