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#!/bin/bash

# Script to install Docker and Docker Compose on a Linux system

# status: tested

# published by: Deepak Raj

# published on: 2024-08-28

# Check if the script is run as root

if [ "$EUID" -ne 0 ]; then

echo "Please run as root or use sudo."

exit 1

# Update package lists

echo "Updating package lists..."

apt-get update -y

# Install necessary packages

echo "Installing packages for Docker installation..."

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

# Add Docker’s official GPG key

echo "Adding Docker's official GPG key..."

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | apt-key add -

# Set up the stable repository

echo "Setting up the Docker repository..."

add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"

# Update package lists again

echo "Updating package lists..."

apt-get update -y

# Install Docker

echo "Installing Docker..."

apt-get install -y docker-ce

# Fetch the latest Docker Compose version

echo "Fetching the latest Docker Compose version..."

LATEST_COMPOSE_VERSION=$(curl -s https://api.github.com/repos/docker/compose/releases/latest | grep -oP '"tag_name": "\K(.*)(?=")')

# Install Docker Compose

echo "Installing Docker Compose version $LATEST_COMPOSE_VERSION..."

curl -L "https://github.com/docker/compose/releases/download/${LATEST_COMPOSE_VERSION}/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

# Set executable permissions for Docker Compose

echo "Setting executable permissions for Docker Compose..."

chmod +x /usr/local/bin/docker-compose

# Add the current user to the Docker group without needing to input

echo "Adding user to Docker group..."

usermod -aG docker "$SUDO_USER"

# Restart Docker to apply changes

echo "Restarting Docker..."

systemctl restart docker

# Display final message

echo "Docker and Docker Compose installation completed!"

echo "Docker Compose version $LATEST_COMPOSE_VERSION installed."

echo "You might need to log out and log back in to apply the group changes."

# Optional: Print Docker and Docker Compose versions

echo "Docker version:"

docker --version

echo "Docker Compose version:"

docker-compose --version