Meaning and usage of each chapter in the Linux man Manual

Linux man is very powerful. This manual is divided into multiple sections. When using man, you can specify different sections for browsing. The meaning of each section is as follows:

 
1-commands2-SystemCalls3-library calls4-Special files5-file formats and convertions6-GamesForLinux7-macro packages and conventions8-SystemManagement commands9-others
 

Explanations:

1 is a common command

2 is a system call, such as open and write (through this, at least we can easily find the header file to be added to call this function)

3 is a library function, such as printf and fread

4 is a special file, that is, various device files under/dev.

5 refers to the format of the file. For example, passwd, it will explain the meaning of each field in the file.

6 is reserved for games, defined by each game

7. Some variables are attached. For example, global variables such as environ are described here.

8 is a command used for system management. These commands can only be used by root, such as ifconfig

If you want to specify a section, add a number to the end of man. For example:

 MAN 1 lsman 3  printf  

for commands such as open and kill, man open displays open (1), that is, starting from the front section. To view open system calls, MAN 2 open is required.

run the following command to install:

Sudo apt-Get install manpagessudo apt-Get install manpages-desudo apt-Get install manpages-de-devsudo apt-Get install manpages-Dev