Install syncthing on the Raspberry Pi

pre requisites

apt-transport-https

sudo apt install apt-transport-https

Install syncthing

sudo apt install syncthing

CREATE AND EDIT THE CONFIG FILE

syncthing
ctrl-c
nano ~/.config/syncthing/config.xml

Now we need to change the address line to either the IP address of your Pi or to all addresses on your Pi “0.0.0.0”. So replace the address line with for example: <address>0.0.0.0:8384</address>

Set syncthing to start as a service

sudo nano /lib/systemd/system/syncthing.service

The paste the following into the file. Replace <YOUR PI USERNAME HERE> with your Pi username.

[Unit]
Description=Syncthing (File synchronisation)
Documentation=man:syncthing(1)
After=network.target

[Service]
User=<YOUR PI USERNAME HERE>
ExecStart=/usr/bin/syncthing -no-browser -no-restart -logflags=0
Restart=on-failure
RestartSec=5
SuccessExitStatus=3 4
RestartForceExitStatus=3 4

# Hardening
ProtectSystem=full
PrivateTmp=true
SystemCallArchitectures=native
MemoryDenyWriteExecute=true
NoNewPrivileges=true

[Install]
WantedBy=multi-user.target

Enable and run the service.

sudo systemctl enable syncthing
sudo systemctl start syncthing

test out the web interface

Simply open http://<YOUR PI IP ADDRESS>:8384 in a browser and you should see the syncthing GUI. You can customise your install from there. It is highly recommended you set a user and password to enter the GUI.