what is tty linux

TTY stands for teletype or teletypewriter, and it is a subsystem in Linux and Unix that makes process management, line editing, and session management possible at the kernel level through TTY drivers. TTYs are devices that enable typing from a distance, and in a modern operating system, Linux uses a device file to represent a virtual TTY, which enables interaction with the OS by handling input (usually a keyboard) and output (usually a screen) . TTYs can be physical input devices such as a serial port, or they can be virtual TTYs where they allow users to interact with the system. The tty command in Linux prints the name of the terminal youre using, and it is used to check which TTY you are currently using. TTYs are associated with virtual consoles, and they are used for remote terminals, virtual terminals, and terminal multiplexers.