beginner 10 minutes
How to Install Docker on Ubuntu
Step-by-step guide to install Docker Engine and Docker Compose on Ubuntu Linux.
Prerequisites
- Ubuntu 20.04 or newer
- sudo/root access
- Internet connection
1
Update Package Index
First, update your existing list of packages:
sudo apt update
2
Install Prerequisites
Install packages needed to use a repository over HTTPS:
sudo apt install apt-transport-https ca-certificates curl gnupg lsb-release
3
Add Docker's GPG Key
Add the official Docker GPG key to verify packages:
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
4
Add Docker Repository
Set up the stable Docker repository:
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" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
5
Install Docker Engine
Update apt and install Docker:
sudo apt update sudo apt install docker-ce docker-ce-cli containerd.io docker-compose-plugin
6
Add User to Docker Group
Run Docker without sudo by adding your user to the docker group:
sudo usermod -aG docker $USER
You need to log out and back in for this to take effect.
7
Verify Installation
Test that Docker is working correctly:
docker run hello-world