Linux commands are text-based instructions that can be used to interact with a Linux operating system. These commands are entered into a terminal or console and can perform various tasks, such as managing files and directories, configuring system settings, running applications, and more. Linux commands are case-sensitive and typically consist of a command name followed by options and arguments. Many Linux commands also have various options that can be used to modify their behavior. Learning and mastering Linux commands can be very beneficial for system administrators, developers, and anyone who uses Linux regularly, as it can increase productivity and provide more control over the system.