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🐳 Docker Engine Installation Guide (install-docker.sh)
This script automates and guides the installation of Docker CLI, Docker Engine, and necessary dependencies on a Linux host system. WARNING: Running this script requires elevated privileges (sudo). Always run from a secure, non-production machine initially.
🗺️ Prerequisites
Before running any provisioning script, ensure the following are in place:
- A functional
curlclient is installed. - The user executing the command has appropriate permissions (system administrator level rights).
Execution Protocol
The process follows three critical, distinct steps to ensure the entire stack is correctly configured and operational:
Step 1: Download the Official Installation Script
Use curl to fetch the latest official installation manifest from Docker.
# Execute this command in your shell terminal
curl -fsSL https://get.docker.com -o install-docker.sh
Step 2: Run the Installation Script
Execute the downloaded script with elevated permissions. This step pulls and configures all necessary binaries and services.
sudo sh install-docker.sh
Wait for the output to confirm successful installation across all components.
Step 3: Configure User Permissions (Non-negotiable)
Docker commands require administrative access by default. To run Docker without prefixing every command with sudo, you must add your current user ($USER) to the docker group.
sudo usermod -aG docker $USER
Note: You must log out and log back in for this group change to take effect.
[!NOTE] Modernized Workflow For automated, production deployment (CI/CD), avoid standalone shell scripts like this. Best practice dictates using infrastructure-as-code tools such as Ansible or Terraform. These platforms manage dependencies and state much better than a sequential script execution, allowing you to define the desired final state of Docker rather than merely listing steps to achieve it. Always prefer declarative configuration over imperative scripts where possible.