Terminal/dev/tty

Control terminal (/dev/tty)
The console terminal (/dev/ttyn,/dev/console) can be switched using ALT + [F1-F6] keys

Virtual terminal (/dev/pts/n) Pseudo Terminal in xwindows Mode

Q: What is/dev/console?
A:/dev/console refers to the console, which is a device that interacts with the operating system. The system directly outputs some information to the console. Currently, users can log on to the console only in single-user mode.
Q: What is/dev/tty?
A: tty devices include virtual consoles, serial ports, and Pseudo Terminal devices.
/Dev/tty indicates the current tty device. Input echo "Hello">/dev/tty in the current terminal, which will be directly displayed on the current terminal.
Q: What is/dev/TTYs?
A:/dev/TTYs * is a serial terminal device.
Q: What is/dev/Pty?
A:/dev/Pty * is a Pseudo Terminal. The so-called Pseudo Terminal is a logical terminal device and is mostly used to simulate a terminal. Program . For example, we open a terminal in X Window and log on to the Linux host using telnet or SSH in windows, the Pty device is used at this time (to be precise, the Pty slave device should be used ).
Q:/dev/tty0 and/dev/tty1... What is/dev/tty63? What are the differences between them?
A:/dev/tty0 indicates the current virtual console, while/dev/tty1 indicates the first virtual console. For example, when Alt + F2 is used for switching, the system's virtual console is/dev/tty2, and the current console points to/dev/tty2
Q: How do I determine the current terminal (or console )?
A: Use the TTY command to determine the current terminal or console.
Q: Is/dev/console a symbolic link to/dev/tty0?
A:
Currently, in most texts, the/dev/console is a link to/dev/tty0 (including the Linux Kernel Source code Situation analysis), but this is not accurate. Internal
Core documentation. Before 2.1.71,/dev/console can be linked to/dev/tty0 or other tty * based on different system settings.
All are controlled by the kernel. Currently, you can log on to/dev/console only in single-user mode (you can enter the TTY command in single-user mode for confirmation ).
Q: What is the difference between/dev/tty0 and/dev/FB?
A: You can use/dev/tty0 to access the video card in a system not enabled by the framebuffer device.