When I boot my laptop, Bluetooth was on by default:
after searching a while I found it is possible to set it to off when I start up my laptop:
To do this we will edit the “rc.local” file and add a command “rfkill block bluetooth”
step 1. Open rc.local as root in a text editor. in my case I used Gedit.
sudo gedit /etc/rc.local
It will open the rc.local file. Just add the following line just before the last line (which is “exit 0”. )
rfkill block bluetooth
Restart your PC to confirm the change.