Executing commands within command-line applications is a powerful technique that enhances functionality without requiring the implementation of complex features from scratch. Utilizing the `os/exec` package in Go streamlines this process, allowing developers to run external commands, capture their output, and manage error handling efficiently. By showcasing methods like `Output` and `CombinedOutput`, this approach not only simplifies capturing standard output and error streams but also highlights the importance of leveraging existing system tools—such as FFmpeg for video processing—to automate workflows. The application of these techniques is further illustrated through practical examples, indicating how command execution can enhance application performance and functionality. Future lessons will delve into more advanced topics, including passing input to commands and managing long-running processes, equipping developers with the skills needed to build robust CLI tools.