Linux Get Help

1 * Copyright (c) Level 2012, Yantai University School of Computer Science

2 * All rights reserved.

3 * Pay Record Super

4 * Completion Date: April 7, 2015

5 * Version number: v1.0

6 * Learning topic: Command Help

7 * Usage Environment: Linux command line

8 * Benefits of Use:

9 * Usage Time:

10 * How to use:

11 * Learning Content:

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First, use the command manual Man Cloud Spark

Mans command

Call Path/usr/share/doc/man

The specific contents of each chapter of man

1: Command user, anyone can use

2:system Call system Calls

3: library Call

4: Special files (device files)

5: File format (syntax for configuration file) Example: Man 5 passwd

6:games

7: Miscellaneous

8: Management Commands

whatis Command View commands in which chapter of man

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<> Required Options

[] selectable options

... can appear multiple times

Name: command names and features brief description

Sysnopsis: Usage notes, including available options

Description: A detailed description of the command function that reports the meaning of each option

Options: Explaining the meaning of each option

Files: The configuration file associated with this command

Bugs: Provide bug to original author

Examfiles: Using the example

See also: another reference

Find in Man manual

/keyword looking backwards from the front

？ Keyword looking forward from behind

N: Next Match option

N: Previous Match option

Help command use

1:help command (for system commands)

-S displays only a small amount of information

Determine if the command is an internal command

Method 1:type Command

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Method 2:compgen-b

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Method Three: Manbuiltin lists all the built-in commands

Command-help Suitable for external commands

Forum CU Linuxsir

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Linux Get Help