Docker
Various Docker setup guides and tutorials

Docker Setup Guide on Ubuntu Server
This guide will help you set up Docker on your Ubuntu Server for the first time. We'll cover installing Docker, running your first container, and basic usage. 

 Prerequisites 

 

 Ubuntu Server : Ubuntu 18.04 LTS or newer is recommended. 

 User Privileges : A user account with sudo privileges. 

 

 

 Step 1: Update Your System 

 Begin by updating your package list and upgrading existing packages: 

 

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 sudo apt update

sudo apt upgrade -y

 

 

 

 Step 2: Install Required Packages 

 Install packages that allow apt to use repositories over HTTPS: 

 

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 sudo apt install -y ca-certificates curl gnupg

 

 

 

 Step 3: Add Docker’s Official GPG Key 

 Create a directory for the keyrings: 

 

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 sudo install -m 0755 -d /etc/apt/keyrings

 

 

 Add Docker's official GPG key: 

 

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 curl -fsSL https://download.docker.com/linux/ubuntu/gpg | \

 sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg

 

 

 Set appropriate permissions: 

 

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 sudo chmod a+r /etc/apt/keyrings/docker.gpg

 

 

 

 Step 4: Set Up the Docker Repository 

 Add the Docker APT repository to your system: 

 

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 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 

 Update the package database: 

 

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 sudo apt update

 

 

 Install Docker Engine and related components: 

 

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

 

 

 

 Step 6: Verify Docker Installation 

 Run the hello-world image to verify that Docker is installed correctly: 

 

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 sudo docker run hello-world

 

 

 You should see a message that says "Hello from Docker!" 

 

 Step 7: Manage Docker as a Non-Root User (Optional) 

 To run Docker commands without sudo , add your user to the docker group: 

 

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 sudo usermod -aG docker $USER 

 

 

 Log out and log back in to apply the group membership. 

 Test Docker without sudo : 

 

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 docker run hello-world

 

 

 

 Step 8: Enable Docker to Start on Boot 

 Ensure Docker starts automatically when the system boots: 

 

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 sudo systemctl enable docker.service

sudo systemctl enable containerd.service

 

 

 

 Step 9: Basic Docker Commands 

 List Docker Images 

 

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 docker images

 

 

 List Running Containers 

 

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 docker ps

 

 

 List All Containers (Including Stopped Ones) 

 

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 docker ps -a

 

 

 Pull an Image from Docker Hub 

 

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 docker pull ubuntu:latest

 

 

 Run a Container 

 

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 docker run -it ubuntu:latest /bin/bash

 

 

 This command runs an Ubuntu container and provides an interactive shell. 

 Stop a Running Container 

 First, find the container ID using docker ps , then stop it: 

 

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 docker stop <container_id>

 

 

 

 Conclusion 

 You've successfully installed Docker on your Ubuntu Server and run your first container. You can now explore Docker's features further by creating your own images, managing containers, and integrating Docker into your workflows. 

 

 References 

 

 Docker Documentation: Install Docker Engine on Ubuntu 

 Docker Hub