Introduction - If you have any usage issues, please Google them yourself
In the Linux system, the terminal is a character-type device, it has many types, usually referred to tty to various types of terminal equipment. Linux in the terminal equipment includes the following categories: 1. Serial port terminal (/ dev/ttySn) serial port terminals (Serial Port Terminal) is the use of computer terminals connected to the serial port. 2. Pseudo-terminals (/ dev/pty /) pseudo-terminals (Pseudo Terminal) is a pair of logical terminal equipment 3. Console terminal (/ dev/ttyn,/dev/console)