Linux
1
| init run levels | effect |
| 0 |
Shutdown |
| 1 |
Single-user mode |
| 2 |
Multi-user text interface |
| 4 |
Multi-user text interface |
| 5 |
Multi-user text interface |
| 6 |
Restart |
| emergecy |
Emergency shell |
2 .. root user login linux, what terminal login prompt is? #
3. Establish an account name is tom, is the root user password
Under the root user, open a terminal and enter usevaddtom established users, change user password passwd tom, simple password OK twice to take effect
4. Log tom user process in the Second virtual terminal?
Ctrl + Alt + F2 to enter the number of the second virtual terminal, enter the user name tom, enter the root password
5. Exit command exit
6. What command format includes, what specific meaning?
Command: Tell Lnux What operating system do.
Option: Description ways to run the command, the option is part of "character" it began.
Parameters: What is the impact description of the command
Command function 7.whoami
Username Lnux lists currently used by the system
8. who function commands
Lists which users are currently working on the system
The output of the command 9.who
Displays all current users logged on, and the current date and time
10. linux system currently logged in, who enter the command, get any results
root: 0 2019-12-06 05: / 0 (: 0) (time varying)
root pts/0 2019-12-06 05:17 (:0)
tom tty2 2019-12-06 05:11
Function II. Date command
The current date and time display system
12. The time is set at 11:40 on December 6, 2019 order
date 120611402019
13. How time synchronization hardware
hwlock-s
Command function 14.cal
Display a calendar month
15. The display command in August 2008 calendar
cal 8 2002
16. Clear Screen command
clear
17. Clear Screen shortcut
ctrl+l
Command function 18.su
Another specify a different user from the user to switch to the current
19. man command function
For instructions to use a Linux command
20. The command su command to view the instructions for use
man su