Raspberry Pi 3b+gpsd 3.16 does not boot automatically after the problem

Since the previous post was resolved by compiling the gpsd3.16 version of GPSD 3.11 after the Raspberry Pi does not work, you want to configure GPSD 3.16 to start automatically.

But after a constant attempt to discover or not succeed, a learning document was found in the process: HTTPS://LEARN.ADAFRUIT.COM/ADAFRUIT-ULTIMATE-GPS-HAT-FOR-RASPBERRY-PI/USE-GPSD.

I think the GPSD 3.16 itself is no problem. Just I was missing before using the command sudo gpsd/dev/ttyusb0-f/var/run/gpsd.sock and cgps-s: sudo systemctl stop gpsd.socket and sudo systemctl D Isable Gpsd.socket.

Thus I uninstalled my compiled version of GPSD 3.16 (inside the release-3.16 directory to perform scons-c and SCons Sconsclean as well as scons uninstall).

Then I reinstall GPSD version 3.11. When I found Port 2947 and was listening, I executed cgps-s, since I was working properly.

It's confusing to me. Associating with the changes I want to make to GPSD 3.16, the biggest of these is sudo nano/etc/default/gpsd, which is configured as follows:

In addition, after uninstalling the 3.16 Reload 3.11, the file is left behind, is this file working, I still do not understand, I hope someone knows can tell.

The following links are as follows:

Https://learn.adafruit.com/adafruit-ultimate-gps-hat-for-raspberry-pi/use-gpsd

Http://www.catb.org/gpsd/client-howto.html

Http://raspberrypi.stackexchange.com/questions/29547/cant-get-gps-to-automatically-work-after-reboot

Http://www.satsignal.eu/ntp/Raspberry-Pi-quickstart.html

https://www.raspberrypi.org/forums/viewtopic.php?f=45&t=53644

Http://catb.org/gpsd/installation.html

https://blog.sleeplessbeastie.eu/2015/04/27/how-to-manage-system-services-on-debian-jessie/