The tutorial provides an overview of using the Aiven command-line interface (CLI) for managing various services, including PostgreSQL, through simple bash commands. It highlights the enhancements made since 2019 to the Aiven CLI, offering guidance on installation, authentication, and executing tasks such as viewing and managing services, clouds, and event logs. The tutorial emphasizes the use of the CLI for quick command execution, scripting, and automation, while also serving as a basic reference for bash scripting. It includes examples of using the --json switch and the jq tool for more powerful data extraction, and offers tips for creating aliases for frequently-used commands. The guide encourages users to explore Aiven's globally-available open-source services and provides resources for further learning and updates.