Open a terminal and use the following command to install gksu, if you dot have it installed it already.
sudo apt-get install gksu
gksu is used to enter password while running a program as root. Once you have gksu installed, use the command below:
gksudo gedit /etc/rc.local
It will open the rc.local file. Just add the following line just before exit 0.
rfkill block bluetooth
Altogether, your rc.local file look like this:
That would be it. Restart the computer and you should see that Bluetooth has been disabled. Of course you can turn it on when required by the Bluetooth indicator on the top panel.
This little section is just to give a brief explanation of what we did here. It’s not obligatory to read this section. You can skip to comment section for your suggestions or thanks
rc.local file is used to run various shell commands at start up time. These commands are user defined. In a clean install, rc.local has no commands to run. What we did here was to add rfkill block bluetooth. rfkill is a tool to query the state of various switches, buttons and subsytem interfaces. With this command in rc.localm we are basically soft blocking Bluetooth at each start up time. I hope this explains the things a bit.