[Linux] virtual console

Linux is a real multi-user operating system that allows multiple users to log on at the same time. Linux also allows a user to log on multiple times, because like Linux and UNIX, the virtual console access mode is provided, allowing users to log on multiple times from the console at the same time. The choice of the virtual console can be achieved by pressing the Alt key and a function key, usually using the F1-F6 For example, after the user login, click the Alt-F2 key, the user can see "login:" prompt, the user sees the second virtual console. Then you just press the Alt-F1 key to go back to the first virtual console. By default, a newly installed Linux system allows users to access the first six virtual consoles with the Alt-F1-to-Alt-F6 key. The virtual console allows users to work on multiple consoles at the same time, truly reflecting the characteristics of multiple users in the Linux system. You can switch to another virtual console to start another job when the work on a virtual console has not been completed.