* You'll get an error message at boot time (to avoid it you need to patch all the scripts);
* You are breaking the logical chain stated in debian-policy concerning runlevel configuration.
If the logic of a debian-like system boot up sequence is not very clear and familiar to you, you should not play with symlinks, permissions, etc. In order to avoid messing up your system, Boot-Up Manager will automate all of your configuration in a nice and clean graphical interface.
Boot-Up Manager is a Perl-Gtk2 application to handle runlevels configuration of any debian derivative system. With this program the user will easily start and stop boot-up scripts, without the necessity to handle thru complex links and permissions.
Boot-Up Manager has been developed and tested on Ubuntu, but as it only relies on Perl-Gtk2 libraries, it can be run on any Debian-like system.
Install Boot-Up Manager in ubuntu
Open the terminal and run the following command
sudo apt-get install bum
Using Boot-Up Manager (BUM)
You can open BUM from System--->Administration--->BootUP Manager
BUM is loading in progress
Once it opens you should see similar to the following screen
BUM Advanced options screen
Change start/stop Priority for one service
For more information check BUM documentation from here