Many people noticed that bluetooth is switched on by default laptop on a laptop running Ubuntu. One method on internet is to stop bluetooth module from loading, but that method prevents from using bluetooth when needed. This can also be used on other Debian based Linux distros with bluetooth enabled by default.
Lets see how to configure it.
Open the Terminal (Applications -> Accesories -> Terminal)
At the prompt, type
sudo nano /etc/rc.local
add following line before the last line exit 0 (highlighted in the screenshot).
rfkill block bluetooth
This is how it works:
Scripts in file /etc/rc.local are executed at the end of all the multi-user boot levels.
Adding
rfkill block bluetooth
turns off bluetooth after the OS starts it.
rfkill provides a generic interface to disabling any radio transmitter in the system.
This helps in reducing the power consumption of a computer and also protects us from wireless radtion.
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