How to Turn ON and Turn OFF Bluetooth from command line ?

Rfkill is a tool for enabling and disabling wireless devices. Using “rfkill list” command we first check the list of available wireless devices supported in our hardware as,

$ rfkill list
0: phy0: Wireless LAN
	Soft blocked: no
	Hard blocked: no
1: brcmwl-0: Wireless LAN
	Soft blocked: no
	Hard blocked: no
3: hci0: Bluetooth
	Soft blocked: no
	Hard blocked: no

As seen above we have a WiFi, LAN and Bluetooth supported and ON in my laptop. Now lets try turning ON & OFF this Bluetooth device using rfkill as,

Turn OFF Bluetooth

 $ rfkill block bluetooth 

Or using “rfkill index” bluetooth can be turned off as,

 $ rfkill block 3 

Now, as we can see in “rfkill list” Bluetooth is now turned OFF,

$ rfkill list
3: hci0: Bluetooth
	Soft blocked: yes
	Hard blocked: no

Turn ON Bluetooth

 $ rfkill unblock bluetooth 

OR using “rfkill list” index,

 $ rfkill unblock 3