Make bluetooth disabled by default

Question

each time I open Ubuntu I have to turnoff bluetooth function from the top panel. my questions is that is there any method to make it disabled by default?

Answer 1

To disable bluetooth service on startup

sudo nano /etc/rc.local

add this line before exit 0

rfkill block bluetooth

Answer 2

Following the answer here, what worked for me (in Ubuntu 14.04) was

sudo gedit /etc/bluetooth/main.conf
InitiallyPowered = true     # keep it that way
# add the following:
# start bluetooth on boot?
# compatibility note: if this variable is _not_ found bluetooth will start
BLUETOOTH_ENABLED=0

Save the file and reboot.