Auto start a Python service on beaglebone angustrom

after making several python web service, I wish to have the web service starts when power on beaglebone, this link is the reference:
http://stackoverflow.com/questions/11152657/angstrom-start-up-processes-beaglebone





example:
Go in to /lib/systemd/system/ and open  the bone101.service, this is a service file for 101 stuff.
so we have to create our service

I have a PyBBIO web service stuff named as u4glass_tank.py
saved as glass_tank.service

[Unit]
Description=Python glass tank web service

[Service]
WorkingDirectory=/home/root/PyBBIO/examples
ExecStart=/usr/bin/python u4glass_tank.py

[Install]
WantedBy=multi-user.target


Then go to terminal do the following:
systemctl enable glass_tank.service

To start the service, you can reboot or execute

systemctl start glass_tank.service
To check if the service is running and get the latest outputs from the script:

root@beaglebone:~# systemctl status glass_tank.service

in terminal it would return like this:


glass_tank.service - glasstank web service
Loaded: loaded (/lib/systemd/system/glass_tank.service; enabled)
Active: active (running) since Thu, 22 Nov 2012 12:28:44 +0000; 5 months and 17 days ago
Main PID: 332 (python)
CGroup: name=systemd:/system/glass_tank.service
â 332 /usr/bin/python u4glass_tank.py
â 334 /usr/bin/python u4glass_tank.py


if we wish to remove this service from startup list,use following command:
systemctl disable glass_tank.service

terminal would return rm '/etc/systemd/system/multi-user.target.wants/glass_tank.service'

if you check with systemctl status glass_tank.service, ou will find the service is still running.
to stop the service right away, you will need:
systemctl stop glass_tank.service

then, check again with systemctl status glass_tank.service, you will see it's stopped.


When working with new beaglebone black with debian, I met some problem, that the service is loaded, but not active, it's always shown dead
another example on debian
https://gist.github.com/tstellanova/7323116

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