Just did an do-release-upgrade from 16.04 to 18.04 and ran into this issue as well. The following fixed it like mentioned above.
sudo mv /usr/share/dbus-1/system-services/org.freedesktop.systemd1.service /usr/share/dbus-1/system-services/org.freedesktop.systemd1.service.bak sudo apt-get install -f sudo apt dist-upgrade sudo apt autoremove
Just did an do-release-upgrade from 16.04 to 18.04 and ran into this issue as well. The following fixed it like mentioned above.
sudo mv /usr/share/ dbus-1/ system- services/ org.freedesktop .systemd1. service /usr/share/ dbus-1/ system- services/ org.freedesktop .systemd1. service. bak
sudo apt-get install -f
sudo apt dist-upgrade
sudo apt autoremove