Several ways to find help documents in Linux

Beginner Linux, see a few ways to see the command help, feel useful so record with this, in case of a rainy, also hope to help others. Just learn, if there is a mistake, but also ask you seniors do not make enlighten.

One, the help command-->shell Embedded command can use this command.

Ii. command--help Use Help for normal format with commands

Manual: Man [Options] command--user manual There are several main options in the man command: NAME: Functional Description, Synopsis: Syntax format (very important), DESCRIPTION: Description, Options: option, EXAMPLES: example, AUTHOR: Author, see also Reference,

The following symbols appear in the syntax format: 1. [] Indicates content optional,2.<> must provide content, 3.a|b|c multiple Select one, 4 .... Similar content can appear multiple,

Manual is a compressed format of the file, there are chapters of the section, where Man1 is user commands, ordinary users and administrator users can use the command, man2 system calls, MAN3C Library calls, Man4 device files and special files, man5 file format (profile format), Man6 game use Help , Man7 Miscellaneous, MAN8 management tools and daemons.

Not every command has a manual under all chapters, which can be viewed by Whatis command, which is queried during execution and can be manually updated by the database: Make Whatis.

How to do when the man command opens the manual:

Flip Screen: space: Turn the file to the end of a screen

B: Flip a screen to the file header

Ctrl+d: Turn half screen at the end of the file

Ctrl+k: Turn half screen to file header

Enter: Flip a line to the end of the file

K: Flip a line to the file header

G: Jump to the last line

/g: Jump to the first line

Text Search:

/keyword-to-keyword lowercase, from the file header to the end of the search, uppercase and vice versa;

/keyword-to-keyword lowercase, from the end of the file to the first search, uppercase and vice versa;

Exit: Q

The man command can take the option-m/path/to/somedir to the specified directory to find the manual and open it.

Iv. Info Command--get command online documentation

Five, many apps bring your own Help document:/usr/share/doc/app-version

README: Information about the program

Install: Installation Help

Changes: Change information for version iterations

VI. official documentation for the mainstream distribution

VII. official documentation of the program

Eight, search engine: Google

Finally: To learn English, learn English, learn English, important things to say three times!

Several ways to find help documents in Linux