Linux Bash is a command-line interface used in many Linux distributions. It allows users to interact with the operating system by typing commands, which can perform various tasks like file management, system monitoring, and software installation. Bash stands for "Bourne Again SHell," named after its predecessor, the Bourne shell. Bash is popular among developers and system administrators because it enables automation through scripting. Users can write scripts to execute a series of commands, making repetitive tasks easier and more efficient. Overall, Bash is a powerful tool for managing and controlling Linux systems.