first time installation apt

# Add Docker's official GPG key:
sudo apt-get update
sudo apt-get install ca-certificates curl gnupg
sudo install -m 0755 -d /etc/apt/keyrings
curl -fsSL <https://download.docker.com/linux/ubuntu/gpg> | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
sudo chmod a+r /etc/apt/keyrings/docker.gpg

# Add the repository to Apt sources:
echo \\
  "deb [arch="$(dpkg --print-architecture)" signed-by=/etc/apt/keyrings/docker.gpg] <https://download.docker.com/linux/ubuntu> \\
  "$(. /etc/os-release && echo "$VERSION_CODENAME")" stable" | \\
  sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
sudo apt-get update

docker packages

sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

docker images

Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

systemctl start docker

snap install

sudo apt install docker.io

sudo snap install docker

docker --version

sudo docker run hello-world

sudo docker images

sudo docker ps -a

sudo docker ps

sudo apt  install docker-compose

Making it remove sudo

sudo groupadd docker
sudo usermod -aG docker $USER
newgrp docker

//to enable boot on docker
systemctl is-enabled docker

//if not enabled 
sudo sysctemctl enable docker.service
sudo sysctemctl enable containerd.service

sudo systemctl disable docker.service
sudo systemctl disable containerd.service

RESTART

sudo chmod 666 /var/run/docker.sock gives access so no need to do sudo before

How to Install Docker on Ubuntu: A Step-By-Step Guide

https://docs.docker.com/engine/install/ubuntu/

docker uninstall

for pkg in docker.io docker-doc docker-compose podman-docker containerd runc; do sudo apt-get remove $pkg; done