命令幫助篇man和info

時間 2020-07-11

標籤命令幫助 man info 简体版

原文原文鏈接

本文出自做者學習鳥哥linux私房菜的學習筆記html

若有雷同毫不是巧合linux

一 mangit

linux裏邊有句俗語叫作有問題找男人，這個男人就是man （manual）redis

man 命令名稱就能獲得詳細的命令的相關解釋shell

（1）eg：man dateless

DATE(1) User Commands DATE(1)ide

#請注意上邊這個括號內的數字函數

NAME <==這個命令的完整全名，以下所示爲date且說明簡單用途爲設置與顯示日期/時間工具

date - print or set the system date and time學習

SYNOPSIS <==這個命令的基本語法以下所示

date [OPTION]... [+FORMAT]

date [-u|--utc|--universal] [MMDDhhmm[[CC]YY][.ss]]

DESCRIPTION <==詳細說明剛纔語法談到的參數的用法

Display the current time in the given FORMAT, or set the system date.

-d, --date=STRING

display time described by STRING, not ‘now’

-f, --file=DATEFILE

like --date once for each line of DATEFILE

#………………中間省略若干字

#下面就是格式化輸出的詳細數據

FORMAT controls the output. The only valid option for the second form

specifies Coordinated Universal Time. Interpreted sequences are:

%% a literal %

%a locale’s abbreviated weekday name (e.g., Sun)

%A locale’s full weekday name (e.g., Sunday)

%b locale’s abbreviated month name (e.g., Jan)

%B locale’s full month name (e.g., January)

%c locale’s date and time (e.g., Thu Mar 3 23:05:25 2005)

%C century; like %Y, except omit last two digits (e.g., 21)

%d day of month (e.g, 01)

%D date; same as %m/%d/%y

%e day of month, space padded; same as %_d

%F full date; same as %Y-%m-%d

%g last two digits of year of ISO week number (see %G)

%G year of ISO week number (see %V); normally useful only with %V

%h same as %b

%H hour (00..23)

%I hour (01..12)

%j day of year (001..366)

%k hour ( 0..23)

%l hour ( 1..12)

%m month (01..12)

%M minute (00..59)

%n a newline

%N nanoseconds (000000000..999999999)

%p locale’s equivalent of either AM or PM; blank if not known

%P like %p, but lower case

%r locale’s 12-hour clock time (e.g., 11:11:04 PM)

%R 24-hour hour and minute; same as %H:%M

%s seconds since 1970-01-01 00:00:00 UTC

%S second (00..60)

%t a tab

%T time; same as %H:%M:%S

%u day of week (1..7); 1 is Monday

%U week number of year, with Sunday as first day of week (00..53)

%V ISO week number, with Monday as first day of week (01..53)

%w day of week (0..6); 0 is Sunday

%W week number of year, with Monday as first day of week (00..53)

%x locale’s date representation (e.g., 12/31/99)

%X locale’s time representation (e.g., 23:13:48)

%y last two digits of year (00..99)

%Y year

%z +hhmm numeric timezone (e.g., -0400)

%:z +hh:mm numeric timezone (e.g., -04:00)

%::z +hh:mm:ss numeric time zone (e.g., -04:00:00)

%:::z numeric time zone with : to necessary precision (e.g., -04,

+05:30)

%Z alphabetic time zone abbreviation (e.g., EDT)

ENVIRONMENT <==與這個命令相關的環境參數有以下說明

TZ Specifies the timezone, unless overridden by command line param-

eters. If neither is specified, the setting from /etc/localtime

is used.

AUTHOR <==這個命令的做者

Written by David MacKenzie.

REPORTING BUGS <==有問題請致信下面的郵箱

Report bugs to <bug-coreutils@gnu.org>.

This is free software. You may redistribute copies of it under the

terms of the GNU General Public License

<http://www.gnu.org/licenses/gpl.html>. There is NO WARRANTY, to the

extent permitted by law.

SEE ALSO <==這個重要，你還能夠從哪裏查到與date相關的說明文件之意

The full documentation for date is maintained as a Texinfo manual. If

the info and date programs are properly installed at your site, the

command

info date

should give you access to the complete manual.

date 5.97 March 2011 DATE(1)

（二）man文件主要是看description部分

進入man的操做頁面後的一些操做

：後輸入

/string 向下查詢字符串

？string 向上查詢字符串

n/N 使用/ ?是 n查詢下一個，N查詢上一個

空格向下翻頁 q退出

（三）date(數字)

數字的含義1~9

其中1,5,8比較重要

1，用戶shell環境中能夠操做的命令或執行文件

2，系統內核可調用的函數與工具等

3，一些經常使用的函數和函數庫

4，設備文件說明，一般在/dev下的文件

5，配置文件或者是某些文件的格式

6，遊戲

7.慣例與協議

8，系統管理員可用的管理命令

9，跟kernel有關的文件

用man 1（1~7） man 方式來取得更詳細的說明

（四）man -f man取得man命令的說明文件

man -k man 利用關鍵字將說明文件裏面含有man的字相關的取出來

whatis 至關於man -f

apropos 至關於man -k

二 info

相關標籤/搜索

每日一句

每一个你不满意的现在，都有一个你没有努力的曾经。