Installing Docker on Raspberry Pi 4 - Who doesn't like virtualization

Diagram of type 1 hypervisor, type 2 hypervisor and os level virtualization(container)

Steps involved in installing Docker on Raspberry Pi 4

Update and Upgrade 

1. sudo apt-get update

2. sudo apt-get upgrade

3. curl sSL https://get.docker.com -o get-docker.sh

Execute the shell script using the command

4. sudo sh get-docker.sh

Add the current user to the docker group

5. sudo usermod -aG docker $USER

Screenshot of before and after using the usermod command

Above entries are from the file /etc/group 

6. sudo reboot

groups cmd will show that docker the group member of the user qwakaw

To view the docker version

7. docker version

Execute a simple hello world container 

8. docker run hello-world

Hiccups and fews cmds 

List packages installed Raspberry Pi OS which is Debian based

apt list --installed

dpkg -l | grep neofetch

Hangs during upgrade process

Setting up realvnc-vnc-server (7.13.1.57) ...

Updating /etc/pam.d/vncserver

Updating /etc/pam.conf... done

Looking for font path...

Solution

sudo apt-get remove realvnc-vnc-server

cmd to view the env variables

printenv 

printenv USER

or

echo $USER

6printenv-cmd.png

Used Photoflare to crop images in raspberry Pi 4(be patient when using the selection tool)