3 Introduction to the "Men" of Linux

Daily sentence: Brother Ma your daily sentence!!! Decisive move out of the motto: Bao Jianfeng from sharpening out, plum blossom from bitter cold (=.=!)

• Internal command

  • The so-called internal command, which is the command that comes with the bash environment, can be queried by type command

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• Internal commands can be viewed with help command

  • []: Brackets indicate that the contents of parentheses are optional

  • <>: angle brackets are indicated as must have content

  • !: An exclamation mark indicates that two is selected

  • ... : ellipses indicate that homogeneous content can have multiple

    
    

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External command: It has a corresponding executable program, and many in the/bin directory

• COMMAND--help

  • Short Help available

"Men man": manual most manuals in the/usr/share/bin directory

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• How to use: Man # COMMAND

• Chapter: 1-9,

  • 1: User command
    

  • 2: System call

  • 3: library Call

  • 4: Device files

  • 5: Configuration file

  • 6: Game

  • 7: Miscellaneous

  • 8: Management Commands

  • 9: Do not care (=.=!)

• Whatis KEYWORD Displays the chapters and brief information about your keywords

• Man-k KEYWORD Unlike the previous command, the command is a fuzzy match

• Shortcut command:

  • !#: Execute the # command in the command history

  • !! : Executes the last command executed

  • ! String: Executes the last command using string

  • esc+ '. ' : Call last parameter of last command

  • !$: Last option of last command
    

This article is from the "Ops Dog" blog, make sure to keep this source http://yunweigou.blog.51cto.com/6299641/1625804

3 Introduction to the "Men" of Linux