Tag Archives: linux

Disabling Bluetooth on Ubuntu/Debian

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If you don’t use you Bluetooth on your laptop then you might want to disable it. Firstly it’s another service your computer does not have to start up when it boots and secondly it will use less power.

For all the following commands you will probably need root access, i.e. you may need to prefix “sudo”.

To stop the bluetooth service use the following command.

/etc/init.d/bluetooth stop

Now lets remove the Bluetooth services from starting when you boot up:

update-rc.d bluetooth remove

Unfortunately Bluetooth support is build into the Kernal itself, but the following line should prevent the Kernel from loading up:

echo 'alias net-pf-31 off' >> /etc/modprobe.conf

That’s it, all done. When you reboot Bluetooth should not restart itself any more.

Apache Web server: Too many levels of symbolic links

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After having this error presented to myself recently I thought it would be handy to let others know what it means!

So you’ve tried to restart/reload/start Apache on your Linux box and the following error has come up:

Too many levels of symbolic links

This is caused by one or more of the symlinks in the sites-enabled dir linking to its-self (maybe not directly but eventually ends up there :-( ). I had my created my symlink using the command:

 ln -s <target> <destination>

But when I created the symlink my working directory was the same location as the file I wanted to link to, so I just typed:

ln -s somefile /var/somedir/somefile_link

Turns out this does not quite do as I had expected. (although not sure why)

The Solution

Basically the answer is to delete the symbolic link and start again this time using full path name, then is should all work:

ln -s /etc/apache2/sites-available/somefile /var/somedir/somefile_link