Linux命令学习总结:date命令【转】

Linux命令学习总结:date命令【转】

本文转自:http://www.cnblogs.com/kerrycode/p/3427617.html

命令简介:

 

date 根据给定格式显示日期或设置系统日期时间。print or set the system date and time

指令所在路径:/bin/date

命令语法:

 

date [OPTION]… [+FORMAT]

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

 

命令参数:

参数

描述

-d

显示字符串描述的时间

-f

显示DATEFILE文件中的每行时间

-r

显示文件的最后修改时间

-R

以RFC-2822兼容日期格式显示时间

-rfc-2822

以RFC-2822兼容日期格式显示时间

-s

设置时间为string

-u

显示或设定为Coordinated Universal Time时间格式

–help

显示date命令的帮助信息

–version

显示date命令的版本信息

Format参数格式

要说写这位程序的 David MacKenzie老兄,真是事无巨细啊,居然整了这么多格式参数,佩服佩服。

参数

描述

%%

显示字符%

%a

星期几的缩写(Sun..Sat)

%A

星期几的完整名称(Sunday…Saturday)

%b

月份的缩写(Jan..Dec)

%B

月份的完整名称(January..December)

%c

日期与时间。只输入date指令也会显示同样的结果

%C

世纪(年份除100后去整) [00-99]

%d

日期(以01-31来表示)。

%D

日期(含年月日)。

%e

一个月的第几天 ( 1..31)

%F

日期,同%Y-%m-%d

%g

年份(yy)

%G

年份(yyyy)

%h

同%b

%H

小时(00..23)

%I

小时(01..12)

%j

一年的第几天(001..366)

%k

小时( 0..23)

%l

小时( 1..12)

%m

月份(01..12)

%M

分钟(00..59)

%n

换行

%N

纳秒(000000000..999999999)

%p

AM or PM

%P

am or pm

%r

12小时制时间(hh:mm:ss [AP]M)

%R

24小时制时间(hh:mm)

%s

从00:00:00 1970-01-01 UTC开始的秒数

%S

秒(00..60)

%t

制表符

%T

24小时制时间(hh:mm:ss)

%u

一周的第几天(1..7); 1 表示星期一

%U

一年的第几周,周日为每周的第一天(00..53)

%V

一年的第几周,周一为每周的第一天 (01..53)

%w

一周的第几天 (0..6); 0 代表周日

%W

一年的第几周,周一为每周的第一天(00..53)

%x

日期(mm/dd/yy)

%X

时间(%H:%M:%S)

%y

年份(00..99)

%Y

年份 (1970…)

%z

RFC-2822 风格数字格式时区(-0500)

%Z

时区(e.g., EDT), 无法确定时区则为空

   

 

使用示例:

 

1: 查看date命令帮助信息

   1: [root@DB-Server ~]# date --help
   2:  
   3: Usage: date [OPTION]... [+FORMAT]
   4:  
   5: or: date [-u|--utc|--universal] [MMDDhhmm[[CC]YY][.ss]]
   6:  
   7: Display the current time in the given FORMAT, or set the system date.
   8:  
   9: -d, --date=STRING display time described by STRING, not `now'
  10:  
  11: -f, --file=DATEFILE like --date once for each line of DATEFILE
  12:  
  13: -r, --reference=FILE display the last modification time of FILE
  14:  
  15: -R, --rfc-2822 output date and time in RFC 2822 format
  16:  
  17: --rfc-3339=TIMESPEC output date and time in RFC 3339 format.
  18:  
  19: TIMESPEC=`date', `seconds', or `ns' for
  20:  
  21: date and time to the indicated precision.
  22:  
  23: -s, --set=STRING set time described by STRING
  24:  
  25: -u, --utc, --universal print or set Coordinated Universal Time
  26:  
  27: --help display this help and exit
  28:  
  29: --version output version information and exit
  30:  
  31: FORMAT controls the output. The only valid option for the second form
  32:  
  33: specifies Coordinated Universal Time. Interpreted sequences are:
  34:  
  35: %% a literal %
  36:  
  37: %a locale's abbreviated weekday name (e.g., Sun)
  38:  
  39: %A locale's full weekday name (e.g., Sunday)
  40:  
  41: %b locale's abbreviated month name (e.g., Jan)
  42:  
  43: %B locale's full month name (e.g., January)
  44:  
  45: %c locale's date and time (e.g., Thu Mar 3 23:05:25 2005)
  46:  
  47: %C century; like %Y, except omit last two digits (e.g., 21)
  48:  
  49: %d day of month (e.g, 01)
  50:  
  51: %D date; same as %m/%d/%y
  52:  
  53: %e day of month, space padded; same as %_d
  54:  
  55: %F full date; same as %Y-%m-%d
  56:  
  57: %g last two digits of year of ISO week number (see %G)
  58:  
  59: %G year of ISO week number (see %V); normally useful only with %V
  60:  
  61: %h same as %b
  62:  
  63: %H hour (00..23)
  64:  
  65: %I hour (01..12)
  66:  
  67: %j day of year (001..366)
  68:  
  69: %k hour ( 0..23)
  70:  
  71: %l hour ( 1..12)
  72:  
  73: %m month (01..12)
  74:  
  75: %M minute (00..59)
  76:  
  77: %n a newline
  78:  
  79: %N nanoseconds (000000000..999999999)
  80:  
  81: %p locale's equivalent of either AM or PM; blank if not known
  82:  
  83: %P like %p, but lower case
  84:  
  85: %r locale's 12-hour clock time (e.g., 11:11:04 PM)
  86:  
  87: %R 24-hour hour and minute; same as %H:%M
  88:  
  89: %s seconds since 1970-01-01 00:00:00 UTC
  90:  
  91: %S second (00..60)
  92:  
  93: %t a tab
  94:  
  95: %T time; same as %H:%M:%S
  96:  
  97: %u day of week (1..7); 1 is Monday
  98:  
  99: %U week number of year, with Sunday as first day of week (00..53)
 100:  
 101: %V ISO week number, with Monday as first day of week (01..53)
 102:  
 103: %w day of week (0..6); 0 is Sunday
 104:  
 105: %W week number of year, with Monday as first day of week (00..53)
 106:  
 107: %x locale's date representation (e.g., 12/31/99)
 108:  
 109: %X locale's time representation (e.g., 23:13:48)
 110:  
 111: %y last two digits of year (00..99)
 112:  
 113: %Y year
 114:  
 115: %z +hhmm numeric timezone (e.g., -0400)
 116:  
 117: %:z +hh:mm numeric timezone (e.g., -04:00)
 118:  
 119: %::z +hh:mm:ss numeric time zone (e.g., -04:00:00)
 120:  
 121: %:::z numeric time zone with : to necessary precision (e.g., -04, +05:30)
 122:  
 123: %Z alphabetic time zone abbreviation (e.g., EDT)
 124:  
 125: By default, date pads numeric fields with zeroes.
 126:  
 127: The following optional flags may follow `%':
 128:  
 129: - (hyphen) do not pad the field
 130:  
 131: _ (underscore) pad with spaces
 132:  
 133: 0 (zero) pad with zeros
 134:  
 135: ^ use upper case if possible
 136:  
 137: # use opposite case if possible
 138:  
 139: After any flags comes an optional field width, as a decimal number;
 140:  
 141: then an optional modifier, which is either
 142:  
 143: E to use the locale's alternate representations if available, or
 144:  
 145: O to use the locale's alternate numeric symbols if available.
 146:  
 147: Report bugs to <bug-coreutils@gnu.org>.
 148:  

   1: [root@DB-Server ~]# man date
   2:  
   3: DATE(1) User Commands DATE(1)
   4:  
   5: NAME
   6:  
   7: date - print or set the system date and time
   8:  
   9: SYNOPSIS
  10:  
  11: date [OPTION]... [+FORMAT]
  12:  
  13: date [-u|--utc|--universal] [MMDDhhmm[[CC]YY][.ss]]
  14:  
  15: DESCRIPTION
  16:  
  17: Display the current time in the given FORMAT, or set the system date.
  18:  
  19: -d, --date=STRING
  20:  
  21: display time described by STRING, not ‘now’
  22:  
  23: -f, --file=DATEFILE
  24:  
  25: like --date once for each line of DATEFILE
  26:  
  27: -r, --reference=FILE
  28:  
  29: display the last modification time of FILE
  30:  
  31: -R, --rfc-2822
  32:  
  33: output date and time in RFC 2822 format
  34:  
  35: --rfc-3339=TIMESPEC
  36:  
  37: output date and time in RFC 3339 format. TIMESPEC=‘date’, ‘seconds’, or ‘ns’ for date and time to the indicated precision.
  38:  
  39: -s, --set=STRING
  40:  
  41: set time described by STRING
  42:  
  43: -u, --utc, --universal
  44:  
  45: print or set Coordinated Universal Time
  46:  
  47: --help display this help and exit
  48:  
  49: --version
  50:  
  51: output version information and exit
  52:  
  53: FORMAT controls the output. The only valid option for the second form specifies Coordinated Universal Time. Interpreted sequences are:
  54:  
  55: %% a literal %
  56:  
  57: %a locale’s abbreviated weekday name (e.g., Sun)
  58:  
  59: %A locale’s full weekday name (e.g., Sunday)
  60:  
  61: %b locale’s abbreviated month name (e.g., Jan)
  62:  
  63: %B locale’s full month name (e.g., January)
  64:  
  65: %c locale’s date and time (e.g., Thu Mar 3 23:05:25 2005)
  66:  
  67: %C century; like %Y, except omit last two digits (e.g., 21)
  68:  
  69: %d day of month (e.g, 01)
  70:  
  71: %D date; same as %m/%d/%y
  72:  
  73: %e day of month, space padded; same as %_d
  74:  
  75: %F full date; same as %Y-%m-%d
  76:  
  77: %g last two digits of year of ISO week number (see %G)
  78:  
  79: %G year of ISO week number (see %V); normally useful only with %V
  80:  
  81: %h same as %b
  82:  
  83: %H hour (00..23)
  84:  
  85: %I hour (01..12)
  86:  
  87: %j day of year (001..366)
  88:  
  89: %k hour ( 0..23)
  90:  
  91: %l hour ( 1..12)
  92:  
  93: %m month (01..12)
  94:  
  95: %M minute (00..59)
  96:  
  97: %n a newline
  98:  
  99: %N nanoseconds (000000000..999999999)
 100:  
 101: %p locale’s equivalent of either AM or PM; blank if not known
 102:  
 103: %P like %p, but lower case
 104:  
 105: %r locale’s 12-hour clock time (e.g., 11:11:04 PM)
 106:  
 107: %R 24-hour hour and minute; same as %H:%M
 108:  
 109: %s seconds since 1970-01-01 00:00:00 UTC
 110:  
 111: %S second (00..60)
 112:  
 113: %t a tab
 114:  
 115: %T time; same as %H:%M:%S
 116:  
 117: %u day of week (1..7); 1 is Monday
 118:  
 119: %U week number of year, with Sunday as first day of week (00..53)
 120:  
 121: %V ISO week number, with Monday as first day of week (01..53)
 122:  
 123: %w day of week (0..6); 0 is Sunday
 124:  
 125: %W week number of year, with Monday as first day of week (00..53)
 126:  
 127: %x locale’s date representation (e.g., 12/31/99)
 128:  
 129: %X locale’s time representation (e.g., 23:13:48)
 130:  
 131: %y last two digits of year (00..99)
 132:  
 133: %Y year
 134:  
 135: %z +hhmm numeric timezone (e.g., -0400)
 136:  
 137: %:z +hh:mm numeric timezone (e.g., -04:00)
 138:  
 139: %::z +hh:mm:ss numeric time zone (e.g., -04:00:00)
 140:  
 141: %:::z numeric time zone with : to necessary precision (e.g., -04, +05:30)
 142:  
 143: %Z alphabetic time zone abbreviation (e.g., EDT)
 144:  
 145: By default, date pads numeric fields with zeroes. The following optional flags may follow ‘%’:
 146:  
 147: - (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
 148:  
 149: 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,
 150:  
 151: or O to use the locale’s alternate numeric symbols if available.
 152:  
 153: ENVIRONMENT
 154:  
 155: TZ Specifies the timezone, unless overridden by command line parameters. If neither is specified, the setting from /etc/localtime is used.
 156:  
 157: AUTHOR
 158:  
 159: Written by David MacKenzie.
 160:  
 161: REPORTING BUGS
 162:  
 163: Report bugs to <bug-coreutils@gnu.org>.
 164:  
 165: COPYRIGHT
 166:  
 167: Copyright ? 2006 Free Software Foundation, Inc.
 168:  
 169: 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
 170:  
 171: the extent permitted by law.
 172:  
 173: SEE ALSO
 174:  
 175: 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
 176:  
 177: info date
 178:  
 179: should give you access to the complete manual.
 180:  
 181: date 5.97 May 2011 DATE(1)
 182:  

2:查看date命令的版本信息

   1: [root@DB-Server ~]# date --version
   2:  
   3: date (GNU coreutils) 5.97
   4:  
   5: Copyright (C) 2006 Free Software Foundation, Inc.
   6:  
   7: This is free software. You may redistribute copies of it under the terms of
   8:  
   9: the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.
  10:  
  11: There is NO WARRANTY, to the extent permitted by law.
  12:  
  13: Written by David MacKenzie.
  14:  

3:运用-d参数

   1: [root@DB-Server ~]# date -d now
   2:  
   3: Thu Nov 14 22:52:45 PST 2013
   4:  
   5: [root@DB-Server ~]# date -d 'next monday'
   6:  
   7: Mon Nov 18 00:00:00 PST 2013
   8:  
   9: [root@DB-Server ~]# date -d yesterday +%Y%m%d
  10:  
  11: 20131113
  12:  

4:显示文件中的时间

   1: [root@DB-Server ~]# cat >date.txt
   2:  
   3: 2013-11-17 10:54:00
   4:  
   5: 2013-11-22 11:11:11
   6:  
   7: [root@DB-Server ~]# more date.txt 
   8:  
   9: 2013-11-17 10:54:00
  10:  
  11: 2013-11-22 11:11:11
  12:  
  13: [root@DB-Server ~]# date -f date.txt
  14:  
  15: Sun Nov 17 10:54:00 PST 2013
  16:  
  17: Fri Nov 22 11:11:11 PST 2013
  18:  

5:显示文件最后修改的时间

   1: [root@DB-Server ~]# date -r install.log
   2:  
   3: Fri Sep 6 11:31:15 PDT 2013
   4:  

6:按各种格式显示当前日期时间

这个命令的格式参数实在是太多了,在此没有必要每一个参数都尝试一遍,大家可以对唱Format参数表,自己敲一敲命令实践一下。

   1: 6.1 只显示当前日期的年份
   2:  
   3: [root@DB-Server ~]# date +%Y
   4:  
   5: 2013
   6:  
   7: 6.2 只显示当前日期的月份
   8:  
   9: [root@DB-Server ~]# date +%m
  10:  
  11: 11
  12:  
  13: 6.3 显示各种格式类型的日期
  14:  
  15: [root@DB-Server ~]# date +%D
  16:  
  17: 11/14/13
  18:  
  19: [root@DB-Server ~]# date '+%Y-%m-%d'
  20:  
  21: 2013-11-14
  22:  
  23: [root@DB-Server ~]# date +%Y-%m-%d
  24:  
  25: 2013-11-14
  26:  
  27: [root@DB-Server ~]# date +%m/%d/%y
  28:  
  29: 11/14/13
  30:  
  31: [root@DB-Server ~]# date +%m/%d/%Y
  32:  
  33: 11/14/2013
  34:  
  35: .......
  36:  

7: 设置系统时间

 

 

   1: [root@DB-Server ~]# date -s "2013-11-14 00:00:00"
   2:  
   3: Thu Nov 14 00:00:00 PST 2013

作者:
潇湘隐者

本文版权归作者所有,欢迎转载,但未经作者同意必须保留此段声明,且在文章页面明显位置给出原文连接.

版权声明:本文内容由互联网用户自发贡献,该文观点仅代表作者本人。本站仅提供信息存储空间服务,不拥有所有权,不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容, 请联系我们举报,一经查实,本站将立刻删除。

发布者:全栈程序员-站长,转载请注明出处:https://javaforall.net/109338.html原文链接:https://javaforall.net

(0)
全栈程序员-站长的头像全栈程序员-站长


相关推荐

  • s一般怎么称呼自己的m_一般要怎么选合适自己的中频熔炼炉呢?

    s一般怎么称呼自己的m_一般要怎么选合适自己的中频熔炼炉呢?中频熔炼炉全称“中频感应式熔炼炉”,又名中频熔金机,在金属熔炼领域有着广泛的应用,特别是对于首饰铸造加工行业,起着至关重要的地位。市面上的中频熔炼炉那么多要怎么去选择呢?要如何去选择一款安全可靠的设备支持我们的企业的生产不掉链子呢?那就点从下面几个因素开始考虑了。基本我们在挑选设备功率的时候,需要考虑五个因素,1、要根据日常的生产需要去选择相对产品的性能。例如要看加热的体积和相应面积;加热体积大…

    2022年6月23日
    40
  • DFS(深度优先搜索算法)「建议收藏」

    DFS(深度优先搜索算法)「建议收藏」基本概念深度优先搜索算法(DepthFirstSearch,简称DFS):一种用于遍历或搜索树或图的算法。沿着树的深度遍历树的节点,尽可能深的搜索树的分支。当节点v的所在边都己被探寻过或者在搜寻时结点不满足条件,搜索将回溯到发现节点v的那条边的起始节点。整个进程反复进行直到所有节点都被访问为止。属于盲目搜索,最糟糕的情况算法时间复杂度为O(!n)。算法思想回溯法(探索与回溯法…

    2022年6月18日
    29
  • ItemDataBound的用法

    ItemDataBound的用法原理:在生成datalist列时ItemDataBound触发,也就是说每生成一列就触发一次。这个事件的触发要早于itemcommand.  datalist里面嵌套datalist:内层控件数据绑定与事件声明在外层的ItemDataBind中实现private void dlFileType_ItemDataBound(object sender, System.Web.UI….

    2022年10月13日
    0
  • 几种tree命令的简单安装方法

    几种tree命令的简单安装方法Linux基础tree命令的安装tree命令以树状图列出文件目录结构。不过某些Linux上(Centos6)没有tree命令,本文将介绍安装方法。一、利用镜像安装安装tree命令步骤1.查看系统版本:cat/etc/issue//查看发行版本2.将对应镜像放入光驱,3.挂载镜像文件mount/dev/cd

    2022年7月24日
    10
  • Selenium面试问题及答案30题版「建议收藏」

    Selenium面试问题及答案30题版「建议收藏」********************************************************************************************************近期我会在博客中系统的更新一些关于Selenium的文章,也…

    2022年6月20日
    17
  • Linux 命令完全手册「建议收藏」

    Linux 命令完全手册「建议收藏」这本《Linux命令完全手册》将涵盖你作为开发者需要用到的60个核心Bash命令。每个命令都附有代码示例和用法提示。这本手册遵循二八定律:你花两成的时间学习一个主题,便可获得其中八成的知识。我觉得这种方式能给你一个全面的概述。这本手册并不试图涵盖所有关于Linux及其命令的内容,而是专注于那些你在大部分时间里都会用到的小型核心命令,同时试着简化更复杂命令的用法。以下介绍的命令,在Linux、macOS、WSL和其他类UNIX环境均可使用。我希望这本手册的内…

    2022年9月23日
    0

发表回复

您的邮箱地址不会被公开。 必填项已用 * 标注

关注全栈程序员社区公众号