Command-line tools are software programs that allow users to interact with their computer's operating system through text-based commands. Instead of using a graphical interface with buttons and icons, users type specific commands into a terminal or command prompt. This method can be more efficient for experienced users, as it often allows for quicker execution of tasks. These tools are commonly used for various purposes, such as file management, system monitoring, and software installation. Examples of command-line tools include Git for version control, curl for transferring data, and grep for searching text. They are essential for developers and system administrators who need precise control over their systems.