rfkill list
0: hci0: Bluetooth
	Soft blocked: no
	Hard blocked: no
1: phy0: Wireless LAN
	Soft blocked: no
	Hard blocked: no


hciconfig --all
hci0:	Type: BR/EDR  Bus: USB
	BD Address: 00:00:00:00:00:00  ACL MTU: 0:0  SCO MTU: 0:0
	DOWN
	RX bytes:60 acl:0 sco:0 events:10 errors:0
	TX bytes:40 acl:0 sco:0 commands:10 errors:0


sudo hciconfig hci0 reset
Can't init device hci0: Operation not supported (95)

dmesg | grep  blue
[    7.397584] init: Failed to spawn bluetooth main process: unable to execute: No such file or directory

dmesg | grep  tooth
[    5.119514] Bluetooth: Core ver 2.16
[    5.119553] Bluetooth: HCI device and connection manager initialized
[    5.119555] Bluetooth: HCI socket layer initialized
[    5.119557] Bluetooth: L2CAP socket layer initialized
[    5.119563] Bluetooth: SCO socket layer initialized
[    5.122455] Bluetooth: Generic Bluetooth USB driver ver 0.6
[    7.397584] init: Failed to spawn bluetooth main process: unable to execute: No such file or directory
[  195.657018] Bluetooth: hci0 command tx timeout


lsusb | grep Bluetooth
Bus 001 Device 005: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)