cfnet-fs can be run as a system service so that is runs whenever the system its running on boots.

1. Copy the cfnet-fs executable to /usr/local/bin/:

   sudo cp cfnet-fs /usr/local/bin/
   sudo chmod +x /usr/local/bin/cfnet-fs

2. Create a /etc/systemd/system/cfnet-fs.service file with the following contents:

   [Unit]
   Description=Run cfnet-fs filesystem service
   After=multi-user.target
   
   [Service]
   Type=oneshot
   RemainAfterExit=true
   ExecStart=/usr/local/bin/cfnet-fs /tmp/cfnet-fs /dev/i2c-0 /dev/i2c-1 /dev/i2c-3
   
   [Install]
   WantedBy=multi-user.target

3. Enable the service so it will start whenever the system boots:

   sudo systemctl enable cfnet-fs.service

4. Reboot, or run the following to start the service immediately:

   sudo systemctl start cfnet-fs.service