linux-(9) Getting Help under Linux

1.-H or--help parameter

In Linux, almost all commands can be obtained by using the-H or--help parameters to obtain the use of method parameter information.

2. Man

The man command is the most commonly used help command in Linux, and the command to get help runs the man command as a parameter to get the appropriate documentation help.

The man document is divided into many types:

1 User Commands

2 Kernel system calls

3 Library functions

4 Special Documents and equipment

5 File formats and specifications

6 games

7 specifications, standards and other pages

8 System Administration Commands

9 Linux Kernel API

Man-k < keywords > can be used to query documents that contain this keyword

3. Info

The info command is similar to man, but the information provided is more in-depth and is displayed in a web-like format.

Both man and info can be searched by the "/keyword" method

4. Many programs, commands with detailed documentation, such as txt,html,pdf in the/usr/share/doc directory, these documents are the most detailed documentation of the corresponding program

linux-(9) Getting Help under Linux