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I would like to run a command (that turns off bluetooth devices) at every startup. I normally use cron for these, but this is a command that needs to be ran as root. How do I do this?

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4  
If you don't want bluetooth, why don't you just disable the bluetooth service? – Garrett Nov 18 '11 at 20:07

You could try putting the commands in /etc/rc.local. Commands in this file should be run at the end of the boot sequence.

Disabling the drivers, and or software as has described by skrewler is often a good solution.

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You can still use cron to do it.

make an entry in /etc/crontab like this

@reboot  root /path/to/your/command

or as root type

crontab -e

and make an etry like:

@reboot /path/to/your/command

The /etc/crontab is the global crontab and thus you need to specify the user, crontab -e invokes the per-user crontab.

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You're looking to modify your init.d scripts / setting. This can get complex and depends on your distro. You might be able to edit or create /etc/init/bluetooth.conf or /etc/defaults/bluetooth. But I think Vixie Cron supports cron jobs for root and has a start up time setting.

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If you are on Fedora run this chkconfig --level 12345 bluetooth off

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