connect bluetooth device from cli

We use bluetoothctl tool which is command-line to BlueZ

$ sudo bluetoothctl

Enable authentication agent

[bluetooth]# agent on

Run the scan process

[bluetooth]# scan on

Pair with the device

[bluetooth]# pair 00:25:56:D1:36:6B

Connect to the device

[bluetooth]# connect 00:25:56:D1:36:6B

more information https://docs.ubuntu.com/core/en/stacks/bluetooth/bluez/docs/reference/pairing/outbound