Learning linux-Foundation II (terminal type)

Linux terminal type

The terminal types of Linux include console terminal, virtual terminal, pseudo terminal, serial terminal, control terminal and graphics terminal.

Terminal

To understand the pseudo-terminal (Pseudo Terminal), first look at what is "terminal" (Terminal).

A terminal is a type of character device that has many types, usually using a TTY for short-range end devices.

1. Serial port terminal (/DEV/TTYSX)

The serial port terminal (Serial Port Terminal) is a terminal device connected using a computer serial port. The computer sees each serial port as a character device. These serial ports correspond to the device name/DEV/TTYS0,/DEV/TTYS1, and so on.

2. Console Terminal (/dev/console)

In UNIX systems, computer monitors are often referred to as console terminals. The console is associated with the virtual terminal and the kernel sends the information to the console terminal (/dev/console) and displays the information to the screen via a virtual terminal associated with the console.

3. Control Terminal (/dev/tty)

The control terminal does not face the device, but the face of the process, about this concept, "advanced programming of the UNIX environment," The 9th chapter is discussed in detail.

4. Pseudo Terminal

The pseudo terminal features a device similar to the terminal, but it is not connected to any terminal hardware. A pseudo terminal is typically a terminal that is used to log on to a Linux host via X-woindow, SSH, or Telnet.

5. Virtual Terminal (/dev/tty#)

The virtual terminal is a terminal opened by Linux via Ctrl-alt-f[1-6].

6, Graphics terminal (/DEV/TTY7) startx,xwndows

CentOS 6:ctrl+alt+f7

CENTOS7: at which terminal to boot, that is, the terminal.

Learning linux-Foundation II (terminal type)