Docker Installation

Install Docker Engine

# 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

# Install Docker packages:
sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

Configure Docker for Non-Root Usage

# Create the docker group if it doesn't exist
sudo groupadd docker

# Add your user to the group
sudo usermod -aG docker $USER

Refresh Group

newgrp docker

Verify Installation

# Test Docker (should print 'Hello from Docker!')
docker run hello-world

# Verify Compose (should print version info)
docker compose version

Set Docker to start on boot

sudo systemctl enable docker.service
sudo systemctl enable containerd.service

Enable Log Rotation: Docker logs can quickly consume all your disk space. Create a global configuration to limit log size

sudo nano /etc/docker/daemon.json

Paste Code

{
  "log-driver": "json-file",
  "log-opts": {
    "max-size": "10m",
    "max-file": "3"
  }
}

Restart Docker

sudo systemctl restart docker