Preparing to unpack .../unattended-upgrades_0.93.1ubuntu2.2_all.deb ...
Failed to connect to bus: Connection refused
Failed to connect to bus: Connection refused
Failed to connect to bus: Connection refused
invoke-rc.d: initscript unattended-upgrades, action "stop" failed.
dpkg: warning: subprocess old pre-removal script returned error exit status 1
dpkg: trying script from the new package instead ...
Failed to connect to bus: Connection refused
Failed to connect to bus: Connection refused
Failed to connect to bus: Connection refused
invoke-rc.d: initscript unattended-upgrades, action "stop" failed.
dpkg: error processing archive /var/cache/apt/archives/unattended-upgrades_0.93.1ubuntu2.2_all.deb (--unpack):
 subprocess new pre-removal script returned error exit status 1