Switching the virtual terminal: ctrl + alt + Fx (x is 1-6)
System V init run levels systemd target name role
0 runlevel0.target,poweroff.target 关机
1 runlevel1.target, poweroff.target single-user mode
2 runlevel2.target, poweroff.target multi-user text interface
3 runlevel3.target, poweroff.target multi-user text interface
4 runlevel4.target, poweroff.target multi-user text interface
5 runlevel5.target, poweroff.target multi-user graphical interface
6 runlevel6.target,poweroff.target 重启
emergency emergency.target
Cal command function
cal command usage example
Function clear command
Clear screen shortcuts
su and passwd command
Function su command
su command usage example
passwd command function
Usage example passwd
Use man command to get help
man command function
man command usage example
* Use the command name --help "to get help
Definition: The operating system is used to coordinate, manage and control computer systems hardware and software resources, which is located between hardware and applications.
Command: tell what Linux operating system execution
Option: Description ways to run the command (you can change the function command), the option is part - the beginning of the character
Parameter: Description command influence (operation) is what, such as a file, directory, text
heat or
exit
/boot
whoami
who
date
cal
clear
useradd
passwd
his
man
help
Open Linux operating system, asked to log in as root GNOME graphical user interface, language support options for Chinese
Use the shortcut through the switch to virtual terminal 2. Using a normal user log in to view the system prompt
5 Use quoted Jin command to exit the user is logged on 2 virtual terminal
Use the shortcut key to switch to virtual terminal 5, an administrator login to view the system prompt
Use the command to exit the user is logged on a virtual terminal 5
6) cut back to a graphical interface, right-click to open a terminal having a surface, the system shut down command input
Hill 2, right-click the desktop to open the terminal as the root user to log in and view current login account used by Linux systems
Check with which users work on the system
Jin modify the current lead time for the August 2018 No. 2611: 2
Out of the October 2015 Calendar
View 18 to 56 using two command instructions
7th build tom user, password "123" as the user tom
Username 9) mux system used