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You can then test the status of the Bluetooth service under either SysV init or systemd as follows

From

Cover of Exploring Raspberry Pi

Note

manually start the bluez service by running :
sudo systemctl start bluetooth

stop:
sudo systemctl stop Bluetooth

restart:
sudo systemctl restart Bluetooth

To enable the bluez service to run at boot run:
sudo systemctl enable bluetooth

https://learn.adafruit.com/install-bluez-on-the-raspberry-pi/installation 20180430,HFS