Syncthing is an open-source file synchronization application.

Platform support

It has applications for Linux, Android, and Windows.

• Windows and Linux https://syncthing.net/downloads/
• Android app https://f-droid.org/en/packages/com.nutomic.syncthingandroid/

Running in the background

By default, when you run syncthing, the application starts a web browser to connect to the local web GUI. You can prevent this by running syncthing --no-browser instead.

You can also run Syncthing as a systemd service. Here’s the service file I use for this.

[Unit]
Description=Syncthing service
After=network.target

[Service]
User=leo
Group=leo
ExecStart=/usr/bin/syncthing --no-browser
Restart=on-failure
RestartSec=10
WorkingDirectory=/home/leo

[Install]
WantedBy=multi-user.target