How to Install Docker and Docker Compose

Introduction

Docker allows you to package applications in containers. This guide covers installing Docker and Docker Compose.

Step 1: Update System Packages

Ensure your system is up to date before installation.

sudo apt update
sudo apt upgrade -y

Step 2: Install Docker Dependencies

Install required packages for Docker installation.

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

Step 3: Add Docker Repository

Add the official Docker repository to your system.

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
echo "deb [arch=$(dpkg --print-architecture) 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

Step 4: Install Docker

Install Docker Engine and related packages.

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

Step 5: Install Docker Compose

Download and install Docker Compose.

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

Step 6: Add User to Docker Group

Add your user to the docker group to run Docker without sudo.

sudo usermod -aG docker $USER
newgrp docker

Conclusion

Docker and Docker Compose are now installed. You can start deploying containerized applications on your server.