volition@volition-H61M-DS2:~$ sudo apt-get install drupal6
sudo: /etc/sudoers.d/README is mode 0755, should be 0440
[sudo] password for volition:
Reading package lists... Done
Building dependency tree
Reading state information... Done
drupal6 is already the newest version.
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
 drupal6 : Depends: default-mta or
                    mail-transport-agent
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).
volition@volition-H61M-DS2:~$