Command Help for Linux

Help internal command

For non-internal commands, you cannot use-help to view Help

External command--help #一般都会提供 "help" option

Mans command to view the Help information for the command, with the following types of help:

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

2: System call

3: Library User

4: Special files (device files)

5: File Format (configuration file syntax)

6: Game

7: Miscellaneous (Miscellaneous)

8: Management Command (/sbin,/usr/sbin,/usr/local/sbin)

9: Kernel Instructions

Mans:

Name: command names and features brief description

Synopsis: Usage notes, including available options

DESCRIPTION: A detailed description of the command function, which may include the meaning of each option

Options: Explaining the meaning of each option

Files: The configuration file associated with this command

BUGS

EXAMPLES: Using the example

See ALSO: Another reference

<>: Required

[]: Optional

... : multiple times can occur

|: Choose one More

{}: Grouping

Find:

/keyword: Backwards

N: Next

N: Previous

? KEYWORD: Forward

Q: Exit

Online Documentation:

Info COMMAND

Flip Screen

Turn back one screen: SPACE

Turn One screen forward: b

Turn back one line: ENTER

Turn One line forward: K

Get help: Whatis command--help man and info/usr/share/doc/Red Hat documentation (System-to-document)

http://www.redhat.com/docs/

http://kbase.redhat.com/

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Command Help for Linux