What are shell scripts?

Shell scripts are essentially text files that contain a series of commands to be executed by a shell, which is a command-line interface in various operating systems. These scripts play a crucial role in automating repetitive tasks, managing system operations, and simplifying complex command sequences. When a shell script is run, it interprets and executes each command in the order they are written, which allows users to efficiently automate processes such as file manipulation, program execution, and system monitoring.

This answer highlights the core purpose and function of shell scripts, emphasizing their utility in streamlining tasks within a command-line environment. The other options, while they refer to different types of scripts or user interfaces, do not accurately represent what a shell script is or its intended use. For instance, executable files for graphical applications would pertain to applications with graphical user interfaces, and not the command-line automation that shell scripts provide. Similarly, scripts used for web development and visual programming interfaces pertain to separate domains and do not encapsulate the defining characteristics of shell scripts.