To Install Docker on Ubuntu 22.04

Using apt-get install docker.io is an alternative method, but it installs the version of Docker that comes with the default Ubuntu repositories. This version might be slightly older than the latest release from Docker’s official repository. Here’s a comparison and instructions if you’d prefer to go this route:

Option 1: Installing from the Default Ubuntu Repositories

The docker.io package in the default Ubuntu repositories is maintained by Ubuntu, so it may not be as up-to-date as the version directly from Docker.

sudo apt update
sudo apt install -y docker.io

After Installation Steps

1. Start and Enable Docker:

   sudo systemctl start docker
   sudo systemctl enable docker

2. Check Docker Version:

   docker --version

3. Run Docker Without sudo (Optional): To allow running Docker commands without sudo, add your user to the docker group:

   sudo usermod -aG docker $USER

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

Key Differences Between docker.io and Docker’s Official Repository

• Versioning: docker.io might lag behind the latest release, which could lack new features or important bug fixes.
• Updates: Using Docker’s repository allows for quicker updates and access to new versions, as Docker maintains the repository directly.

If you don’t need the absolute latest version, docker.io is generally stable and sufficient for most use cases.