= Systemd service =

Ref [https://medium.com/codex/setup-a-python-script-as-a-service-through-systemctl-systemd-f0cc55a42267 here]

1. Setup script to run as service called test.py
{{{
#!python
import time
from datetime import datetime
while True:
    with open("timestamp.txt", "a") as f:
        f.write("The current timestamp is: " + str(datetime.now()))
        f.close()
    time.sleep(10)
}}}

2. nano /etc/systemd/system/test.service (name of the service which is test in this case)
{{{
[Unit]
Description=My test service
After=multi-user.target

[Service]
Type=simple
Restart=always
ExecStart=/usr/bin/python3 /home/<username>/test.py

[Install]
WantedBy=multi-user.target
}}} 

3. reload systemctl daemon
{{{
#!sh
sudo systemctl daemon-reload
sudo systemctl enable test.service
sudo systemctl start test.service
sudo systemctl stop test.service
sudo systemctl restart test.service
sudo systemctl status test.service
}}}