Running process in the background

Question

I am finding hard to run a process at background using paramiko. I used :

stdin, stdout, stderr = ssh.exec_command(\'executefile.py &\') 

Answer 1

I've tried all the methods described here and here without success, and finally realized that you need to use channels instead of using the SSHClient directly for calling exec_command (this does not work in background):

    client = paramiko.SSHClient()
    client.connect(
        ip_address, username='root', pkey=paramiko_key, timeout=5)
    client.exec_command('python script.py > /dev/null 2>&1 &')

You should create and use a channel, this works in background:

    client = paramiko.SSHClient()
    client.connect(
        ip_address, username='root', pkey=paramiko_key, timeout=5)
    transport = client.get_transport()
    channel = transport.open_session()
    channel.exec_command('python script.py > /dev/null 2>&1 &')

So nohup, dtach, screen, etc, are actually not necessary.