Description: The ‘show variable’ command in command-line interfaces is a fundamental tool that allows users to view the value of a specific variable in their shell environment. Many modern shells, such as Fish Shell, focus on usability and interactivity, offering intuitive syntax that simplifies variable management. By using this command, users can obtain instant information about the contents of variables, which is especially useful for debugging and verifying configurations. This command not only enhances the user experience by providing immediate feedback but also fosters a better understanding of how variables are handled within the shell environment. The ability to display the value of a variable allows developers and system administrators to ensure that their scripts and configurations behave as expected, which is crucial in development and production environments. In summary, ‘show variable’ is an essential command that contributes to the efficiency and effectiveness of working in command-line interfaces, making interaction with the system smoother and more comprehensible.