The man of Linux command

First, Introduction

have been listening to people say that there is a man under Linux is very powerful, met will not understand can ask him, he will be several man command, but never know how to use the men command, such as query the help of different classes in the man followed by numbers, man after the number of what the specific meaning, So check the information to find out, record it, learn

Second, Introduction

The symbol represents the content
1 instructions or executables that the user can manipulate in the shell
2 system core can call functions and tools, etc.
3 Some common functions and function libraries (library), most of which are C's function libraries (LIBC)
4 description of the device file, usually in/dev files
5 profile or some file format
6 games
7 conventions and agreements, such as Linux file systems, network protocols, ASCII code, and so forth
8 Management instructions available to the System Manager
9 Documents related to kernel
Example: Man 5 data

Commonly used is the man command, Man 2 system call, man 3 C function library

The man of Linux command