HowTO:
Auto-start LinBPQ using Systemd and a Non-root User
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methodology should work in current versions of Debian and
Ubuntu, e.g. Stretch, Buster, 18.04 and 20.04, and it should
work in a Linux computer or a Raspberry Pi. Yours Truly is
using this configuration to auto-start pilinbpq in Ubuntu
20.04 on an Odroid XU4. This setup uses screen, so first install screen if not already installed: sudo apt install screen Systemd generally works well for auto-starting applications upon boot, but it starts them using the root user by default. The objective here is to autostart linbpq or pilinbpq using a non-root user. Create a new text file in the /etc/systemd/system directory named "bpq.service" using your favorite editor. For example, to create it using the nano editor, issue this command: sudo nano bpq.service Below is an example of the contents of the text file, bpq.service. [Unit] Description=BPQ After=network.target [Service] Type=forking User=odroid Group=odroid WorkingDirectory=/home/odroid/BPQ ExecStart=/usr/bin/screen -S bpq -d -m /home/odroid/BPQ/pilinbpq SyslogIdentifier=BPQ [Install] WantedBy=multi-user.target Unless you're using an odroid, you will need to edit the User and Group names to match the applicable username for your installation. Also if linbpq or pilinbpq is not located in /home/odroid/BPQ, change the WorkingDirectory above to the actual location. Then on the next line, change the path from /home/odroid/BPQ to the correct path. Also if the executable file you are running is named "linbpq" not "pilinbpq", change that in the ExecStart line as well. Once your bpq.service file is created and edited to match your configuration, issue the following command: (If you make any tweaks to the service file later, re-issue this command.) sudo systemctl daemon-reload Now
it's time to test your new systemd service. Make sure BPQ is not
running, then issue the following command:
sudo systemctl start bpq screen -r bpq To
"detach" the screen session, issue "Ctrl-a" then "d". You
can also just close the terminal window. Because BPQ is
running in screen it will keep right on running if you close the
window. Screen works fine in headless operation using SSH
for remote access.
To
have BPQ autostart upon boot, issue the following command:
sudo
systemctl enable bpq
Another
consideration - when running linbpq or pilinbpq as a non-root
user, don't forget to issue the setcap command - see the link
below:
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