By default Bluetooth device drive has build with your Ubuntu operating system, some time if you could not connect detect it need to install supporting packages in system using apt-get command,

# apt-get install bluetooth bluez-utils blueman


Preparing to unpack .../python-gconf_2.28.1+dfsg-1ubuntu2_amd64.deb ...

Unpacking python-gconf (2.28.1+dfsg-1ubuntu2) ...

Processing triggers for man-db (2.6.7.1-1ubuntu1) ...

Processing triggers for hicolor-icon-theme (0.13-1) ...

Processing triggers for gnome-menus (3.10.1-0ubuntu2) ...

Processing triggers for desktop-file-utils (0.22-1ubuntu1) ...

Processing triggers for mime-support (3.54ubuntu1) ...

Setting up blueman (1.23-git201403102151-1ubuntu1) ...

Setting up bluetooth (4.101-0ubuntu13) ...

Setting up bluez-gstreamer (4.101-0ubuntu13) ...

Setting up bluez-utils (4.101-0ubuntu13) ...

Setting up python-gconf (2.28.1+dfsg-1ubuntu2) ...
# /etc/init.d/bluetooth start
 * Starting bluetooth                     [ OK ]
# /etc/init.d/bluetooth status
 * bluetooth is running

To check your bluetooth device status,
 
# ps aux | grep bluetooth


root       792  0.0  0.0  19292  1200 ?        Ss   09:12   0:00 /usr/sbin/bluetoothd

root      8037  0.0  0.0  15944   916 pts/9    S+   17:09   0:00 grep --color=auto bluetooth
# netstat -anp | grep bluetooth


unix  2      [ ACC ]     STREAM     LISTENING     10688    792/bluetoothd      /var/run/sdp

unix  3      [ ]         STREAM     CONNECTED     10685    792/bluetoothd      

unix  2      [ ]         DGRAM                    10684    792/bluetoothd     

The below commands can help you for shows device configuration and mac address and logs,

lsusb shows a new device:
 
#  lsusb


Bus 001 Device 003: ID 2232:1029  

Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Your bluetooth device MAC:
 
#  hcitool dev


Devices:

    hci0    50:B7:C3:5A:1E:6F

Scanning Bluetooth Device:

This should return the mac address of the bluetooth adaptor:
 
# hcitool scan


Scanning ...

    A0:31:E4:43:BB:1C    thelinuxfaq.com linux

Bluetooth Device logs,
 
#  dmesg | grep Bluetooth


[    2.308955] usb 2-1.4: Product: Bluetooth USB Host Controller

[   12.811908] Bluetooth: Core ver 2.17

[   12.811927] Bluetooth: HCI device and connection manager initialized

[   12.811936] Bluetooth: HCI socket layer initialized

[   12.811940] Bluetooth: L2CAP socket layer initialized

[   12.811945] Bluetooth: SCO socket layer initialized

[   14.627450] usb 2-1.4: Product: Bluetooth USB Host Controller

[   33.279737] Bluetooth: RFCOMM TTY layer initialized

[   33.279751] Bluetooth: RFCOMM socket layer initialized

[   33.279763] Bluetooth: RFCOMM ver 1.11

[   33.427326] Bluetooth: BNEP (Ethernet Emulation) ver 1.3

[   33.427330] Bluetooth: BNEP filters: protocol multicast

[   33.427340] Bluetooth: BNEP socket layer initialized