树莓派安装syncthing

# install necessary package first   
sudo apt-get install apt-transport-https ca-certificates
# add release pgp keys
curl -s https://syncthing.net/release-key.txt | sudo apt-key add -
# add stable channel to sources
echo "deb https://apt.syncthing.net/ syncthing stable" | sudo tee /etc/apt/sources.list.d/syncthing.list
# update & install
sudo apt-get update
sudo apt-get install syncthing