(gutsy)arthur@morgane:~/gutsy$ sudo dpkg -i *.deb
[sudo] password for arthur:
sudo: pam_authenticate: Conversation error
(gutsy)arthur@morgane:~/gutsy$ sudo dpkg -i gdc-4.1_0.25-4.1.2-16ubuntu1_i386.deb
[sudo] password for arthur:
(Reading database ... 15272 files and directories currently installed.)
Preparing to replace gdc-4.1 0.25-4.1.2-16 (using gdc-4.1_0.25-4.1.2-16ubuntu1_i386.deb) ...
Unpacking replacement gdc-4.1 ...
Setting up gdc-4.1 (0.25-4.1.2-16ubuntu1) ...
(gutsy)arthur@morgane:~/gutsy$ gdc --version
gdc (GCC) 4.1.3 20070831 (prerelease gdc 0.25, using dmd 1.021) (Ubuntu 0.25-4.1.2-16ubuntu1)
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

(gutsy)arthur@morgane:~/gutsy$