guitarpro6:i386 (6.1.4) wordt verwijderd ...
ubuntu-minimal (1.361) wordt verwijderd ...
sudo (1.8.16-0ubuntu1.2) wordt verwijderd ...
You have asked that the sudo package be removed,
but no root password has been set.
Without sudo, you may not be able to gain administrative privileges.

If you would prefer to access the root account with su(1)
or by logging in directly,
you must set a root password with "sudo passwd".

If you have arranged other means to access the root account,
and you are sure this is what you want,
you may bypass this check by setting an environment variable 
(export SUDO_FORCE_REMOVE=yes).

Refusing to remove sudo.
dpkg: fout bij verwerken van pakket sudo (--remove):
 subproces pre-removal script geïnstalleerd gaf een foutwaarde 1 terug