View source for Ubuntu2404 Install Docker and Docker Compose

=== Preparation ===

Before we begin, make sure you're logged in with a user account that has sudo privileges.

=== Update System Packages ===

Update your package list to ensure you have the latest versions of packages:

<source lang="bash">
sudo apt update && sudo apt upgrade -y
</source>

=== Install Docker Prerequisites ===

Install the necessary packages for Docker setup:

<source lang="bash">
sudo apt install -y apt-transport-https ca-certificates curl software-properties-common
</source>

=== Setup Docker Repository ===

* '''Add Docker's Official GPG Key''':
 
  <source lang="bash">
  curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
  </source>

* '''Add the Docker Repository''':

  <source lang="bash">
  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
  </source>

=== Install Docker and Docker Compose ===

* '''Update Package List Again''':

  <source lang="bash">
  sudo apt update
  </source>

* '''Install Docker Engine, CLI, Containerd, and Additional Tools''':

  <source lang="bash">
  sudo apt install -y docker-ce docker-ce-cli containerd.io python3-bs4 python3-requests docker-compose
  </source>

* '''Install Docker Compose''':

Here we're downloading the latest version of Docker Compose:

  <source lang="bash">
  sudo curl -L "https://github.com/docker/compose/releases/latest/download/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
  </source>

Make the Docker Compose binary executable:

  <source lang="bash">
  sudo chmod +x /usr/local/bin/docker-compose
  </source>

=== Verify Installation ===

Check if Docker and Docker Compose are installed correctly:

<source lang="bash">
docker --version
docker-compose --version
</source>

=== Configure User Permissions ===

To run Docker commands without <code>sudo</code>, add your user to the <code>docker</code> group:

<source lang="bash">
sudo usermod -aG docker $USER
</source>

'''Note''': After adding your user to the docker group, you'll need to '''log out and log back in''' for the changes to take effect.
If you do not log out and back in, Or you do not add your $USER to the docker group, you will be required to use sudo in some cases. such as ..

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a way to apply group changes without logging out and back in - tip:
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<pre>
exec sudo su -l $USER
</pre>

This command will replace your current shell with a new login shell for your user, which will have the updated group memberships. Both of these methods will apply the group changes immediately, allowing you to use LXD commands without having to log out and back in. 

<b>Remember</b>, these changes only apply to the current terminal session. If you open a new terminal window, you might need to run the command again or log out and back in for the changes to take effect system-wide.
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