sudo apt-get install transmission-cli transmission-common transmission-daemon
transmission-daemon will start automatically each time you start your server, with the settings defined in /var/lib/transmission-daemon/info/settings.json
Make sure the Transmission daemon is not running when changing the config file otherwise your changes will be over written.
sudo systemctl stop transmission-daemon
Now we need to change a few settings.
sudo nano /var/lib/transmission-daemon/info/settings.json