I can't use the shutdown command because the system "Failes to Connect to bus: No such file or directory"

If I use the shutdown command my system throws an error. It happens even if I use shutdown -h or shutdown -h now

user@Domain:~$ sudo shutdown
[sudo] password for user:
Failed to connect to bus: No such file or directory
Failed to connect to bus: No such file or directory
user@Domain:~$ shutdown -h
Failed to connect to bus: No such file or directory
Failed to connect to bus: No such file or directory
user@Domain:~$ shutdown -h now
Failed to connect to bus: No such file or directory

The only command that I can get to work is sudo shutdown -h now

Is this expected behavior?

dbus is installed and up to date...

user@Domain:~$ sudo apt-get install dbus
[sudo] password for user:
Reading package lists... Done
Building dependency tree
Reading state information... Done
dbus is already the newest version (1.10.6-1ubuntu3.3).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

Solution 1:

As it turns out, the issue was with dbus - even though it was installed and up-to-date, it was still broken.

You can reinstall it with

apt-get install --reinstall dbus

Solution 2:

Install dbus module on your machine https://launchpad.net/ubuntu/+source/dbus