1. Date Displays dates use + to output a custom format. Ex:date +%y%m%d
2. Cal Display Calendarex:cal 6666 Show 6,666 calendar
3. BC Simple and useful calculator+ Plus,-minus, * multiply,/Except, ^ index,% take more. Default output integer, set decimal point: Scale=number. quit: Quit. EX: $BCBC 1.06.95
Copyright 1991-1994, 1997, 1998, 2004, 2006 Free Software Foundation, Inc.
This is the free software with absolutely NO WARRANTY.
For details type ' warranty '.
scale=3
66/13
5.076
4. Ctrl + C: Interrupt current OperationCtrl+d: (End of File, EOF or end of Input) exit (exit)
5. Man -man pagePress Space to page,Q to exit.
Ex:man date enters the man page of date
6. directive File significance
Date man page first line date (1)
1 indicates an instruction that can be used by the general user
The corresponding relationship is as follows:
1 instructions or executables that a user can manipulate in a shell environment
2 system core can call functions and tools, etc.
3 Some commonly used functions (function) library, mostly C library (libc)
4 Description of the device file, usually in/dev files
5 configuration Files or the format of some files
6 Games
7 Conventions and protocols, such as Linux file system, network Description of protocol, ASCII code, etc.
8 Administrative commands available to system administrators
9 documents related to kernel
7. Whatis =man-fSearch the Whatis database for complete words
8.apropos =man-ksearch for a string of all pages
9.infosimilar to man, you can view the online Help file in info page format for instructions with the Info page feature.
10./usr/share/doc/Many of the documentation is stored in this directory. Including the kernel and so on.
11.nano Simple and useful text compiler
12.who View online users
13.netstat-a viewing network online status
14.ps-aux Viewing the background execution of the program
15.sync force changed blocks to disk, update the Super block.
16. Shutdown InstructionsShutdown:- R: Reboot after the service of the system is stopped (common)- H: Shuts down the system immediately after the service is stopped. Common
Be sure to add time information, otherwise shutdown will automatically jump to Run-level 1, which is a single-person maintenance loginreboot, Halt, Poweroff
17.init switching execution level
18.fsck file system Check Instructions
19. Restart x WindowX Window Press ALT + CTRL + BACKSPACE
20. Prompt # stands for root user, $ for general user
21. Terminal interface and X Window switchCtrl + Alt + f1~f6: Text Interface log in to TTY1~TTY6 terminalCtrl + Alt + F7: graphical interface Desktop
Your own Linux software/instruction manual (real-time update)
