I've been running a plex meida server for over 10 years. Over that decade, I've gotten married, bought a house, and had 3 kids, so due to lack of time involved, I never upgraded from 16.04 to 18.04. Recently, my original SDD that held the OS finally crapped out. I gave it a proper memorial, and now that my wife and kids are all hooked on it, have been given the permission to upgrade everything. PLAY TIME. So I bought a new 500GB SSD and I upgraded from 16TB Sata raid, to 16TB SAS Raid (bought the controller and the drives). Everything went together beautifully, and the sas card works great, no issues there. My question is my newness to 20.04 and the way things work. Pulling from my 16.04 knowledge, I did the normal

    sudo apt install docker

and everything installed no issue. great. The logical thing I did next was check the status of the program by typing:

    sudo systemctl status docker

and I get the error

    tmataraza@plexstorage:~$ sudo apt-get install docker

    Reading package lists... Done

    Building dependency tree 

    Reading state information... Done 

    The following additional packages will be installed: 

    wmdocker 

    The following NEW packages will be installed: 

    docker wmdocker

    0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded.

    Need to get 14.3 kB of archives.

    After this operation, 58.4 kB of additional disk space will be used.

    Do you want to continue? [Y/n] y

    Get:1 http://us.archive.ubuntu.com/ubuntu focal/universe amd64 wmdocker amd64 1.5-2 [13.0 kB]

    Get:2 http://us.archive.ubuntu.com/ubuntu focal/universe amd64 docker all 1.5-2 [1,316 B]

    Fetched 14.3 kB in 0s (38.1 kB/s)

    Selecting previously unselected package wmdocker.

    (Reading database ... 71232 files and directories currently installed.)

    Preparing to unpack .../wmdocker_1.5-2_amd64.deb ...

    Unpacking wmdocker (1.5-2) ...

    Selecting previously unselected package docker.

    Preparing to unpack .../archives/docker_1.5-2_all.deb ...

    Unpacking docker (1.5-2) ...

    Setting up wmdocker (1.5-2) ...

    Setting up docker (1.5-2) ...

    Processing triggers for man-db (2.9.1-1) ...

    tmataraza@plexstorage:~$ apt-cache policy docker

      docker:

        Installed: 1.5-2

        Candidate: 1.5-2

        Version table:

          *** 1.5-2 500

            500 http://us.archive.ubuntu.com/ubuntu focal/universe amd64 Packages

             100 /var/lib/dpkg/status

    tmataraza@plexstorage:~$ sudo systemctl status docker

    Unit docker.service could not be found.

So I am clueless. If I try to install again, I get docker is already installed, but if I try to check if its running, it says no service available. I scoured the webs and this site and I cant find anything on this subject. I was pretty fluent in 16.04 but apparently Im gonna be a newb again with 20.04. Out of curiosity I tried this same process on plex. Everything worked on install and I know plex is running cuz I can get to the I.P directly and configure my server, however, when I do the status command, I get

    tmataraza@plexstorage:~$ sudo systemctl status plexmediaserver

    Unit plexmediaserver.service could not be found.

Clueless. What am I missing?? Also, it's probably dumb newbie oversight, so dont hold back. lol