Docker Installation Guide on Ubuntu
Docker is a popular tool used for creating, deploying, and running applications using containers. By using Docker, you can ensure that your applications will run in the same environment, regardless of where they are used. This guide will show you how to install the latest version of Docker on Ubuntu.
Step-by-step Guide
Step 1: Update your System
First, it's always a good idea to make sure your system is up to date:
sudo apt update && sudo apt upgrade
Step 2: Install Necessary Packages
Before adding the Docker repository to your system, you need to install some necessary packages. These are needed to use HTTPS for the repository:
sudo apt install \
apt-transport-https \
ca-certificates \
curl \
gnupg \
lsb-release
Step 3: Add Docker's official GPG Key
Next, add the GPG key for the official Docker repository:
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
Step 4: Add Docker Repository
Then, add the Docker repository to your APT sources:
echo \
"deb [arch=amd64 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
Step 5: Update your System
Update the package database with the Docker packages from the newly added repository:
sudo apt update
Step 6: Install Docker
Now you can install Docker:
sudo apt install docker-ce docker-ce-cli containerd.io
Step 7: Configure Docker to Run as a non-root User
By default, running the docker command requires root privileges. To run docker commands as a non-root user without prepending 'sudo', add your user to the docker group:
sudo usermod -aG docker ${USER}
Conclusion
Congratulations, you have successfully installed Docker on Ubuntu and are ready to start creating and managing your own Docker containers! Docker is a powerful tool for developing and deploying software applications, and it's a lot of fun to use once you get the hang of it. Enjoy exploring the world of containerization with Docker!
