Upgrading to 16.04

[Ralf Mardorf]

On Fri, 19 Aug 2016 21:53:30 +1000, Peter wrote:
>On 19/08/16 20:59, Ralf Mardorf wrote:
>> sudo apt update && sudo dpkg -i --force-depends
>> virtualbox-5.1_5.1.4-110228~Ubuntu~xenial_amd64deb && sudo apt-get
>> -f install  
>I then ran the above command which stopped with the error:
>sudo: dkpg: command not found.
       ^^^^
       ^^^^ The command is dpkg and it for sure _is_ installed.