man

man是manual命令的簡寫，上學(xué)時(shí)學(xué)過為手動(dòng)的用手的意思，這是名詞為說明書的意思

man man # 使用這個(gè)命令可以查看man的使用方法

以下為man的描述

DESCRIPTION
man is the system’s manual pager. Each page argument given to man is normally the name of a program, utility or function.
The manual page associated with each of these arguments is then found and displayed.
A section, if provided, will direct man to look only in that section of the manual.
The default action is to search in all of the available sections following a pre-defined order (“1 n l 8 3 2 3posix 3pm 3perl 5 4 9 6 7” by default, unless overridden by the SECTION directive in /etc/manpath.config), and to show only the first page found, even if page exists in several sections.

中文：

man命令是系統(tǒng)說明書的頁面，man中的每個(gè)頁面都是常用的程序、工具或方法的名字

然后找到并顯示與每個(gè)參數(shù)相關(guān)的頁面

如果有section的話，man會(huì)只看section的頁面

默認(rèn)是搜索所有可用的頁面

man的命令類型

seqcontent_econtent_cexample

1	Executable programs or shell commands	常用的系統(tǒng)命令	man top
2	System calls (functions provided by the kernel)	系統(tǒng)調(diào)用	man 2 write
3	Library calls (functions within program libraries)		man 3 printf
4	Special files (usually found in /dev)	特殊文件,也就是/dev下的各種設(shè)備文件
5	File formats and conventions eg /etc/passwd	文件的格式,比如passwd, 就會(huì)說明這個(gè)文件中各個(gè)字段的含義	man 5 passwd
6	Games
7	Miscellaneous (including macro packages and conventions), e.g. man(7), groff(7)	其他命令	man 7 environ
8	System administration commands (usually only for root)	only root	man 8 ifconfig

因?yàn)橛行┟钤诤芏鄍age都有，比如write等，那么想要查詢指定的頁面命令必須加上頁面號(hào)

sections

Conventional section names include NAME, SYNOPSIS, CONFIGURATION, DESCRIPTION, OPTIONS, EXIT STATUS, RETURN VALUE, ERRORS, ENVIRONMENT, FILES, VERSIONS, CON-FORMING TO, NOTES, BUGS, EXAMPLE, AUTHORS, and SEE ALSO. namecontent

NAME	命令名稱
SYNOPSIS	簡介
CONFIGURATION	配置
DESCRIPTION	描述
OPTIONS	參數(shù)
EXIT STATUS
RETURN VALUE	返回值
ERRORS
ENVIRONMENT
FILES
VERSIONS
CONFORMING TO
NOTES
BUGS
EXAMPLE	實(shí)例
AUTHORS	作者
SEE ALSO	其他

ref

ref1

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