Linux Command Manual

Linux commands are not built-in commands and external commands

Built-in commands are part of the shell program

The external command is the software function of the system, and the execution process is controlled by shell

Distinguish between built-in commands and external commands: type

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The built-in command is displayed as a shell builtin;

External command displayed as path

Get help with the use of commands:

Internal command: Help command

External command: Command--help

Command manual: Manual

Man Command view command user manual

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Man (number): Indicates the contents of the chapter; not with numbers: shows the first occurrence of the chapter

Show garbled characters, description character set mismatch, use command export lang=en

Whatis command displays summary information for commands and which chapters appear in

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Manual chapters: A total of 8 chapters

1: User command (/bin,/usr/bin,/usr/local/bin)

2: System call

3: library Call

4: Featured file (device file)

5: File Format (configuration file syntax)

6: Game

7: Miscellaneous

8: Management Commands (/sbin,/usr/sbin,/usr/local/sbin): Modify hardware parameters, hardware operating characteristics, and other system-level configurations

Manual Display content:

Name and function brief description of the command

Synopsis Usage Notes

Function Description of the DESCRIPTION command

Options description

Files command-related profiles

EXAMPLES Example

See ALSO other references

[] means to omit

| Indicates multiple selections and cannot be used simultaneously

< > indicates that it must be given, not optional

... Indicates that more than one can appear

{} means grouping

Flip Screen:

Turn back one screen space (space)

Flip one screen ahead b

Turn back one line enter (enter)

Go ahead and turn the line K

Find:

/keyword: Looking backwards

? KEYWORD: Looking forward

N: Next

N: Previous

Q: Exit

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Linux Command Manual