install docker on ubuntu

To install Docker on Ubuntu, you can follow these steps:

Step 1: Update the system

Open a terminal and run the following command to update your package list:

sudo apt-get update

Step 2: Install required dependencies

Run the following command to install the necessary packages for Docker installation:

sudo apt-get install apt-transport-https ca-certificates curl software-properties-common

Step 3: Add Docker's official GPG key

Add Docker's GPG key to ensure the authenticity of the Docker package:

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

Step 4: Set up the Docker repository

Add Docker’s repository to your APT sources:

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

Step 5: Update the package list again

Update the APT package list to reflect the new Docker repository:

sudo apt-get update

Step 6: Install Docker

Now, you can install Docker by running the following command:

sudo apt-get install docker-ce

Step 7: Check Docker installation

Once the installation is complete, you can verify if Docker is installed correctly by running:

sudo docker --version

Step 8: Manage Docker as a non-root user (optional)

To avoid using sudo with Docker commands, add your user to the docker group:

sudo usermod -aG docker $USER

Then, log out and log back in for this change to take effect.

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That's it! Docker should now be installed and running on your Ubuntu system.