Linux Desktop (X11-based)

Setting up Docker on Linux is generally straightforward, and Docker provides official packages for all major distributions.
Here’s a step-by-step guide to install Docker CE (Community Edition) on the most common Linux distributions.

✅ 1. Prerequisites

• 64-bit Linux system
• sudo privileges
• Internet access

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🐧 Installing Docker on Ubuntu / Debian

🔹 Step 1: Remove Old Versions (if any)

sudo apt remove docker docker-engine docker.io containerd runc

🔹 Step 2: Install Required Packages

sudo apt update
sudo apt install -y \
    ca-certificates \
    curl \
    gnupg \
    lsb-release

🔹 Step 3: Add Docker’s Official GPG Key

sudo mkdir -p /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | \
  sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg

🔹 Step 4: Set Up the Repository

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

🔹 Step 5: Install Docker Engine

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

🔹 Step 6: Verify Installation

sudo docker run hello-world

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🐧 Installing Docker on CentOS / RHEL / Fedora

🔹 Step 1: Remove Old Versions

sudo yum remove docker \
    docker-client \
    docker-client-latest \
    docker-common \
    docker-latest \
    docker-latest-logrotate \
    docker-logrotate \
    docker-engine

🔹 Step 2: Set Up the Repository

sudo dnf -y install dnf-plugins-core
sudo dnf config-manager \
    --add-repo https://download.docker.com/linux/centos/docker-ce.repo

🔹 Step 3: Install Docker Engine

sudo dnf install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

🔹 Step 4: Start Docker

sudo systemctl start docker
sudo systemctl enable docker

🔹 Step 5: Test Docker

sudo docker run hello-world

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👤 (Optional) Run Docker as Non-root User

sudo usermod -aG docker $USER
newgrp docker

Log out and back in or run newgrp docker to apply group changes.

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✅ Common Commands

Task	Command
Check version	docker --version
List containers	docker ps -a
List images	docker images
Run container	docker run hello-world
Enable on boot	sudo systemctl enable docker

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🧪 Test Docker with a Simple Container

docker run -it ubuntu bash