标签：Info week 00 help .. -- Linux time date
系统帮助指令
–help
快速获取需要的选项
Man page
寻找指令用法及详细说明
例如：
[bozhu@bozhuNo1 ~]$ man date
DATE(1) User Commands DATE(1)
NAME
date - print or set the system date and time
SYNOPSIS
date [OPTION]... [+FORMAT]
date [-u|--utc|--universal] [MMDDhhmm[[CC]YY][.ss]]
DESCRIPTION
Display the current time in the given FORMAT, or set the system date.
Mandatory arguments to long options are mandatory for short options too.
-d, --date=STRING
display time described by STRING, not 'now'
-f, --file=DATEFILE
like --date once for each line of DATEFILE
-I[TIMESPEC], --iso-8601[=TIMESPEC]
output date/time in ISO 8601 format. TIMESPEC='date' for date only (the default), 'hours',
'minutes', 'seconds', or 'ns' for date and time to the indicated precision.
-r, --reference=FILE
display the last modification time of FILE
-R, --rfc-2822
output date and time in RFC 2822 format. Example: Mon, 07 Aug 2006 12:34:56 -0600
--rfc-3339=TIMESPEC
output date and time in RFC 3339 format. TIMESPEC='date', 'seconds', or 'ns' for date and time
to the indicated precision. Date and time components are separated by a single space:
2006-08-07 12:34:56-06:00
-s, --set=STRING
set time described by STRING
-u, --utc, --universal
print or set Coordinated Universal Time (UTC)
--help display this help and exit
--version
output version information and exit
FORMAT controls the output. 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., 20)
%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, space padded ( 0..23); same as %_H
%l hour, space padded ( 1..12); same as %_I
%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 time zone (e.g., -0400)
%:z +hh:mm numeric time zone (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)
By default, date pads numeric fields with zeroes. The following optional flags may follow '%':
- (hyphen) do not pad the field
_ (underscore) pad with spaces
0 (zero) pad with zeros
^ use upper case if possible
# use opposite case if possible
After any flags comes an optional field width, as a decimal number; then an optional modifier, which
is either E to use the locale's alternate representations if available, or O to use the locale's
alternate numeric symbols if available.
ENVIRONMENT
TZ Specifies the timezone, unless overridden by command line parameters. If neither is specified,
the setting from /etc/localtime is used.
EXAMPLES
Convert seconds since the epoch (1970-01-01 UTC) to a date
$ date --date='@2147483647'
Show the time on the west coast of the US (use tzselect(1) to find TZ)
$ TZ='America/Los_Angeles' date
Show the local time for 9AM next Friday on the west coast of the US
%H hour (00..23)
%I hour (01..12)
%j day of year (001..366)
%k hour, space padded ( 0..23); same as %_H
%l hour, space padded ( 1..12); same as %_I
%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 time zone (e.g., -0400)
%:z +hh:mm numeric time zone (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)
By default, date pads numeric fields with zeroes. The following optional flags may follow '%':
- (hyphen) do not pad the field
_ (underscore) pad with spaces
0 (zero) pad with zeros
^ use upper case if possible
# use opposite case if possible
After any flags comes an optional field width, as a decimal number; then an optional modifier, which
is either E to use the locale's alternate representations if available, or O to use the locale's
alternate numeric symbols if available.
ENVIRONMENT
TZ Specifies the timezone, unless overridden by command line parameters. If neither is specified,
the setting from /etc/localtime is used.
EXAMPLES
Convert seconds since the epoch (1970-01-01 UTC) to a date
$ date --date='@2147483647'
Show the time on the west coast of the US (use tzselect(1) to find TZ)
$ TZ='America/Los_Angeles' date
Show the local time for 9AM next Friday on the west coast of the US
$ date --date='TZ="America/Los_Angeles" 09:00 next Fri'
GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report date translation bugs to
<http://translationproject.org/team/>
DATE STRING
The --date=STRING is a mostly free format human readable date string such as "Sun, 29 Feb 2004
16:21:42 -0800" or "2004-02-29 16:21:42" or even "next Thursday". A date string may contain items
indicating calendar date, time of day, time zone, day of week, relative time, relative date, and num‐
bers. An empty string indicates the beginning of the day. The date string format is more complex
than is easily documented here but is fully described in the info documentation.
AUTHOR
Written by David MacKenzie.
COPYRIGHT
Copyright © 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the
extent permitted by law.
SEE ALSO
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 coreutils 'date invocation'
should give you access to the complete manual.
GNU coreutils 8.22 November 2015 DATE(1)
| 代号 | 代表内容 |
|---|---|
| 1 | 用户在shell环境中可操作的命令或可执行文件 |
| 2 | 系统内核可调用的函数与工具等 |
| 3 | 常用的 函数 与 函数库 |
| 4 | 设备文件的说明，通常在 /dev下的文件 |
| 5 | 配置文件或是某些文件的格式 |
| 6 | 游戏 |
| 7 | 惯例 与 协议 |
| 8 | 系统管理员可用的管理命令 |
| 9 | 跟内核有关的文件 |
| 代号 | 内容说明 |
|---|---|
| NAME | 数据名称 |
| SYNOPSIS | 命令语法 |
| DESCRIPTION | 完整说明 |
| OPTIONS | 针对SYNOPSIS，举例选项说明 |
| COMMANDS | 但这个程序在执行的时候，可以在此程序中执行的命令 |
| FILES | 这个程序或数据所使用或参考或链接到的某些文件 |
| SEE ALSO | 可以参考跟这个命令或数据有关的其他文件 |
| EXAMPLE | 一些可以参考的范例 |
| 按键 | 说明 |
|---|---|
| 空格 | 向下翻页 |
| [Page Down] | 向下翻页 |
| [Page Up] | 向上翻页 |
| [Home] | 跳转第一页 |
| [End] | 跳转最后页 |
| /string | 查找以下 string 字符串 |
| ?string | 查找以上 string 字符串 |
| n , N | n下一个 string 字符串N上一个 string 字符串 |
| q | 退出 本次 man page |
Info page
将文件数据拆成一个个的段落，每个段落用自己的页面来编写，并且在各个页面中还有类似网页的超链接来跳到各不同的页面中，每个页面都是独立的，可称节点，最为详细的说明！
| 代表 | 说明 |
|---|---|
| File | inof page 来自 xx文件 |
| Node | 代表目前页面属于 Top节点 |
| Next | 下一节点名称 |
| Up | 回到上一节点 |
| 空格 | 向下翻页 |
|---|---|
| [Page Down] | 向下翻页 |
| [Page Up] | 向上翻页 |
| 按键 | 说明 |
| [Tab] | 以 * 向下移动 |
| [Enter] | 以当前光标页进入下一个页面 |
| b | 移动光标到 该 info 页面的第一处 |
| e | 移动光标到 该 info 页面中的最后节点处 |
| n | 下一节点 |
| p | 上一节点 |
| u | 向上移动一层 |
| s (/) | 在 info page 当中查找 |
| h , ? | 显示帮助选项 |
| q | 结束 本次 info page |
标签：Info,week,00,help,..,--,Linux,time,date 来源： https://blog.csdn.net/weixin_45963193/article/details/117671883
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