How To Install Docker On Ubuntu VPS Server

Docker is one of the most powerful containerization platforms used for:

• web applications
• SaaS platforms
• APIs
• DevOps workflows
• microservices
• cloud infrastructure
• scalable deployments

Docker allows applications to run inside isolated containers,
making deployment faster,
lighter,
and more scalable.

In this guide,
you will learn how to install Docker on an Ubuntu VPS server step-by-step.

What Is Docker?

Docker is a containerization platform that packages:

• applications
• libraries
• dependencies
• configurations

into isolated environments called:

containers

Containers run consistently across different environments,
making deployments highly reliable.

Why Use Docker?

Docker provides:

• lightweight virtualization
• faster deployments
• portability
• scalability
• resource efficiency
• simplified application management

It is widely used in:

• cloud infrastructure
• DevOps
• SaaS applications
• enterprise hosting
• development environments

Prerequisites

Before starting,
ensure you have:

• Ubuntu VPS server
• root or sudo access
• SSH access enabled

Recommended operating system:

Ubuntu 22.04 LTS

Step 1 — Connect To Your VPS Server

Connect to your VPS using SSH.

Command:

ssh root@your-server-ip

Example:

ssh root@192.168.1.10

Step 2 — Update Server Packages

Update existing server packages.

Command:

apt update && apt upgrade -y

This improves:

• security
• compatibility
• server stability

Step 3 — Install Required Dependencies

Install required packages.

Command:

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

These packages are required for Docker repositories.

Step 4 — Add Docker GPG Key

Add official Docker security key.

Command:

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg

This verifies Docker packages securely.

Step 5 — Add Docker Repository

Add official Docker repository.

Command:

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" | tee /etc/apt/sources.list.d/docker.list > /dev/null

Step 6 — Refresh Package Database

Update repositories again.

Command:

apt update

Step 7 — Install Docker Engine

Install Docker.

Command:

apt install docker-ce docker-ce-cli containerd.io -y

Docker packages will now install automatically.

Step 8 — Start Docker Service

Start Docker service.

Command:

systemctl start docker

Enable automatic startup on boot.

Command:

systemctl enable docker

Step 9 — Verify Docker Installation

Check Docker version.

Command:

docker --version

Example output:

Docker version 27.x.x

Step 10 — Test Docker Installation

Run Docker test container.

Command:

docker run hello-world

If successful,
Docker is installed correctly.

Important Docker Commands

View Running Containers

docker ps

View All Containers

docker ps -a

Pull Docker Image

docker pull nginx

Run NGINX Container

docker run -d -p 80:80 nginx

Stop Container

docker stop container_id

Remove Container

docker rm container_id

How To Install Docker Compose

Docker Compose helps manage multi-container applications.

Download Docker Compose.

Command:

curl -L "https://github.com/docker/compose/releases/download/v2.29.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

Grant execution permissions.

Command:

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

Verify installation.

Command:

docker-compose --version

Example Docker Compose File

Create:

docker-compose.yml

Example:

version: '3'
services:
  nginx:
    image: nginx
    ports:
      - "80:80"

Start containers:

docker-compose up -d

Common Docker Errors

Docker Service Not Running

Restart Docker:

systemctl restart docker

Permission Denied Error

Add current user to Docker group.

Command:

usermod -aG docker $USER

Logout and login again.

Port Already In Use

Another application may already be using the port.

Check active ports:

netstat -tulpn

Why Businesses Use Docker

Businesses use Docker because it provides:

• scalable deployments
• lightweight infrastructure
• fast application deployment
• cloud compatibility
• DevOps automation
• simplified management

Docker powers modern cloud infrastructure worldwide.

Docker Use Cases

Docker is commonly used for:

• web applications
• APIs
• SaaS platforms
• CI/CD pipelines
• development environments
• Kubernetes infrastructure
• microservices
• cloud hosting

Why Choose DJ Technologies VPS Hosting

DJ Technologies Linux VPS hosting provides:

• NVMe SSD infrastructure
• enterprise virtualization
• premium low latency network
• scalable cloud resources
• Docker optimized environments
• advanced infrastructure security
• high performance VPS hosting
• 24×7 technical support

Our VPS infrastructure is optimized for:

• Docker hosting
• containerized applications
• cloud deployments
• SaaS infrastructure
• enterprise workloads

Final Thoughts

Docker is one of the most powerful technologies for modern Linux VPS hosting.

Its:

• lightweight architecture
• scalability
• deployment flexibility
• container management

make it ideal for:

• developers
• businesses
• SaaS platforms
• cloud infrastructure
• enterprise hosting environments.