How to run python script forever EC2?

Question

Problem is when I run a script like:

python scripy.py

Then when I close the terminal the process is killed.

How to run script forever under Ubuntu 16.04.3 LTS?

I have created a service in /etc/init/publisher.conf like this:

description "Publisher"
author "alissada@gmail.com.com"

start on runlevel [2345]
stop on runlevel [!2345]

env AN_ENVIRONMENTAL_VARIABLE=i-want-to-set

respawn

exec /var/www/__init__.py

When I tried to run this service:

service publisher start

I get an error:

Failed to start publisher.service: Unit publisher.service not found.

Why?

Answer 1

One way would be to use the 'screen' command to start detachable session (apt-get install screen if you don't have it). 'screen' creates what looks like a normal terminal, but you can detach from it (ctrl+a then d I think is the incantation). You can then logout, and whatever you started in the screen session will keep running.

Upon your later return, you can type screen --reattach (I think, you'll have to read the man page) to return to the session you abandoned earlier.