What is a TTY in Linux (tty1~7)

TTY: The general designation of terminal equipment.

The word "TTY" originates from teletypes, or teletypewriters, which originally refers to a telex typewriter, which is used to read and send information through a printer keyboard through a serial line, which is later replaced by a keyboard and a display, so it is now more appropriate to call the terminal. A terminal is a type of character device that has many types, usually using a TTY for short-range end devices.

Tty1~6 is a text-based console, Tty7 is the X Window graphical display manager.

On the local machine, you can switch to the corresponding login console via the CTRL+ALT+F1 (F1-f7 key).

What is a TTY in Linux (tty1~7)