Docker Installation

Install Docker Engine on Ubuntu

All the following steps are coming from this reference .

1. Setup Docker’s apt repository

   # Add Docker's official GPG key:
   sudo apt-get update
   sudo apt-get install ca-certificates curl
   sudo install -m 0755 -d /etc/apt/keyrings
   sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc
   sudo chmod a+r /etc/apt/keyrings/docker.asc
    
   # Add the repository to Apt sources:
   echo \
   "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] 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

2. Install the Docker packages.

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

3. Verify that the Docker Engine installation is successful by running the hello-world image.

   sudo docker run hello-world

4. Manage Docker as a non-root user. [Optional]

   sudo groupadd docker
   sudo usermod -aG docker $USER
   newgrp docker
    
   docker run hello-world # without sudo