Install Docker on Linux

1) Update system

Make sure your system are using latest version of everything

sudo apt update
sudo apt upgrade -y

2) Install package support HTTPS

Those packages help apt download package via HTTPS

sudo apt install apt-transport-https ca-certificates curl software-properties-common -y

3) Add Docker's GPG official

curl -fsSL https://download.docker.com/linux/ubuntu/gpg |sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg

4) Add Docker repository into APT source list

echo "deb [arch=amd64 signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list> /dev/null

5) Install Docker Engine

sudo apt update
sudo apt install docker-ce docker-ce-cli containerd.io -y

6) Check Docker status

If it's fine, you'll see active (running) status

sudo systemctl status docker

7) Allow Docker run without sudo

sudo usermod -aG docker ${USER}
newgrp docker

8) Test Docker

If you see welcome message, it mean Docker install successfully

docker run hello-world

9) Install Docker Compose (Optional)

sudo curl -L "https://github.com/docker/compose/releases/download/1.29.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose sudo chmod +x /usr/local/bin/docker-compose

Now your Linux system ready to go!
Happy Coding.