How to use "man" effectively in the development of Linux
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man is the system's manual pager.
The table below shows the section numbers of the manual followed by the types of pages they contain.
1 Executable programs or shell commands
2 System calls (functions provided by the kernel)
3 Library calls (functions within program libraries)
4 Special files (usually found in /dev)
5 File formats and conventions eg /etc/passwd
6 Games
7 Miscellaneous (including macro packages and conventions),
e.g. man(7), groff(7)
8 System administration commands (usually only for root)
9 Kernel routines [Non standard]
If you don't install man(2/3), please run "sudo apt-get install manpages-dev".
man 2/3 is very useful, for example:
1) man 2 write
WRITE(2) Linux Programmer's Manual WRITE(2)
NAME
write - write to a file descriptor
SYNOPSIS
#include <unistd.h>
ssize_t write(int fd, const void *buf, size_t count);
DESCRIPTION
.......
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