Executing remote python script in background over SSH

Question

I have a python file "run.py" like below on my remote server.

import subprocess
subprocess.Popen(["nohup", "python", "/home/admin/Packet/application.py", "&"])

I want to run that file from my local computer using SSH. I'm trying like the below. However, my local terminal got stuck there. It seems it isn't being run in the background.

ssh -n -f -i /Users/aws/aws.pem admin@hello_world.com 'python /home/admin/run.py'

After running that command, my terminal got stuck.

@kfx, no, absolutely unnecessary. The problem is that the process is indeed not being sent to background — Jan Hudec
– Jan Hudec, Commented Jan 6, 2016 at 13:51
Why is it a python script? Shell would be sufficient and simpler, no? — Jan Hudec
– Jan Hudec, Commented Jan 6, 2016 at 13:52
@moeseth, have you tried simply nohup python /home/admin/Packet/application.py &? — Jan Hudec
– Jan Hudec, Commented Jan 6, 2016 at 13:54
@DavidCullen, please, remember, that it is being started by python subprocess.Popen with a list argument. Therefore NEITHER of & nor >& are special, because list argument is not passed through shell. — Jan Hudec
– Jan Hudec, Commented Jan 6, 2016 at 13:55

Claudio · Accepted Answer · 2016-01-06 14:05:56Z

1

The following is an example I'm using, you can try something like this, customizing the ssh_options.

import subprocess
ssh_options = '-o ConnectTimeout=10 -o PasswordAuthentication=no -o PreferredAuthentications=publickey -o StrictHostKeyChecking=no'
server_name = 'remote_server.domain'
cmd = 'ssh ' + ssh_options + ' ' + server_name + ' "/usr/bin/nohup /usr/bin/python /home/admin/run.py 2>&1 &"'  
p = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)

Later you can redirect the output to a flat file, changing :

2>&1 &

for:

>> /path/lo/log_file.txt 2>&1 &

answered Jan 6, 2016 at 14:05

Claudio

212 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

moeseth Over a year ago

Hey, this works. However, I want to execute script from remote server.

Claudio Over a year ago

My setup is a little more complex, but what I'm doing is basically this, the remote cmd download the script and calls the interpreter to execute it "'/usr/bin/nohup /usr/bin/wget -T3 -qO- " + args.url + args.script + " | " + args.interpreter + ....

Collectives™ on Stack Overflow

Executing remote python script in background over SSH

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related