Problem installing Docker Ubuntu, step related to command "pub" (Ubuntu 18.04) - docker

Question

My ubuntu version:
No LSB modules are available./
Distributor ID: Ubuntu /
Description: Ubuntu 18.04.3 LTS /
Release: 18.04 /
Codename: bionic
To install Docker Engine - Community, you need the 64-bit version of one of these Ubuntu versions:
Disco 19.04
Cosmic 18.10
Bionic 18.04 (LTS) (Mine)
Xenial 16.04 (LTS)
Steps I followed:
Uninstall old versions
$ sudo apt-get remove docker docker-engine docker.io containerd runc
Update the apt package index:
$ sudo apt-get update #HasErrors (2)
(1) Err:14 https://dl.bintray.com/rabbitmq/debian $distribution Release
404 Not Found [IP: 3.124. ..........]
------------------------------------------------
(2) E: The repository 'https://dl.bintray.com/rabbitmq/debian $distribution Release' does not have a Release file.
In consequence: When I get to step 3 in the webpage: https://docs.docker.com/install/linux/docker-ce/ubuntu/
$ sudo apt-key fingerprint 0EBFCD88
pub rsa4096 2017-02-22 [SCEA]
9DC8 5822 9FC7 DD38 854A E2D8 8D81 803C 0EBF CD88
uid [ unknown] Docker Release (CE deb) <docker#docker.com>
sub rsa4096 2017-02-22 [S]
I get this error:
Command 'pub' not found, did you mean:
command 'hub' from snap hub (v2.13.0)
command 'dub' from snap dub (1.15.0)
command 'pcb' from deb pcb-gtk
command 'pcb' from deb pcb-lesstif
command 'pua' from deb pglistener
command 'pudb' from deb python-pudb
command 'puf' from deb puf
command 'pdb' from deb python
command 'dub' from deb dub
command 'publ' from deb atfs
See 'snap info <snapname>' for additional versions.
I just want to install Docker for Ubuntu and i am a little stuck here

Answer 1

Instead of installing from the repository, why don't you try doing it directly.
sudo apt-get update
sudo apt-get remove docker docker-engine docker.io
sudo apt install docker.io
sudo systemctl start docker
sudo systemctl enable docker
If this works, you will notice it only works with sudo the workaround for this issue is mentioned here
Let me know if this doesn't work! I'm also quite confused as to why your errors include RabbitMQ when you are trying to install docker on ubuntu?