Linux command summary date command
Command introduction:
date displays the date according to the given format or sets the system datetime. print or set the system date and time
The path where the command is located: /bin/date
Command syntax:
date [OPTION]... [+FORMAT]
date [-u|--utc|--universal] [MMDDhhmm[[CC]YY][.ss]]
Command parameters:
parameter |
describe |
-d |
Display the time described by the string |
-f |
Display the time of each row in the DATEFILE file |
-r |
Displays the last modification time of a file |
-R |
Display time in RFC-2822 compatible date format |
-rfc-2822 |
Display time in RFC-2822 compatible date format |
-s |
set time as string |
-u |
Display or set to Coordinated Universal Time time format |
--help |
Display help information for the date command |
--version |
Display the version information of the date command |
Format parameter format
To say that David MacKenzie , the man who wrote this program, is really meticulous. He has adjusted so many format parameters, and I admire it.
parameter |
describe |
%% |
display character % |
%a |
Abbreviation for the day of the week (Sun..Sat) |
%A |
Full name of the day of the week (Sunday...Saturday) |
%b |
Abbreviation of the month (Jan..Dec) |
%B |
The full name of the month (January..December) |
%c |
date and time. Entering only the date command will also show the same result |
%C |
Century (year divided by 100) [00-99] |
%d |
Date (in 01-31). |
%D |
Date (including year, month and day). |
%e |
Day of the month (1..31) |
%F |
Date, same as %Y-%m-%d |
%g |
Year (yy) |
%G |
Year (yyyy) |
%h |
Same as %b |
%H |
hours (00..23) |
%I |
Hours (01..12) |
%j |
Day of the year (001..366) |
%k |
hours ( 0..23 ) |
%l |
hours (1..12) |
%m |
Month (01..12) |
%M |
minutes (00..59) |
%n |
newline |
%N |
Nanoseconds (000000000..999999999) |
%p |
AM or PM |
%P |
am or pm |
%r |
12-hour time (hh:mm:ss [AP]M) |
%R |
24-hour time (hh:mm) |
%s |
Seconds since 00:00:00 1970-01-01 UTC |
%S |
seconds (00..60) |
%t |
Tabs |
%T |
24-hour time (hh:mm:ss) |
% u |
Day of the week (1..7); 1 means Monday |
% U |
Week of the year, Sunday is the first day of the week (00..53) |
%V |
Week of the year, Monday is the first day of the week (01..53) |
%w |
Day of the week (0..6); 0 is Sunday |
%W |
Week of the year, Monday is the first day of the week (00..53) |
%x |
Date(mm/dd/yy) |
%X |
Time (%H:%M:%S) |
%and |
Year (00..99) |
%AND |
Year (1970…) |
%with |
RFC-2822 style number format time zone (-0500) |
%WITH |
time zone (eg, EDT), empty if time zone cannot be determined |
|
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Example of use:
1 : View the help information of the date command
date --help
man date
2 : Use the -d parameter
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[root@Gin scripts]# date Sun Jan 29 10:46:03 CST 2017 [root@Gin scripts]# date -d now Sun Jan 29 10:46:07 CST 2017 [root@Gin scripts]# date -d 'next monday' Mon Jan 30 00:00:00 CST 2017 [root@Gin scripts]# date -d yesterday +%Y%m%d 20170128 |
3：显示文件中的时间
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[root@Gin scripts]# cat >date.txt 2013-11-17 10:54:00 2013-11-22 11:11:11
[root@Gin scripts]# more date.txt 2013-11-17 10:54:00 2013-11-22 11:11:11
[root@Gin scripts]# date -f date.txt Sun Nov 17 10:54:00 CST 2013 Fri Nov 22 11:11:11 CST 2013 |
4：显示文件最后修改的时间
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[root@Gin scripts]# date -r date.txt Sun Jan 29 10:49:11 CST 2017 |
5：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，大家可以对照Format参数表，自己敲一敲命令实践一下。
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[root@Gin scripts]# date +%Y 2017 [root@Gin scripts]# date +%m 01 [root@Gin scripts]# date +%D 01/29/17 [root@Gin scripts]# date '+%Y-%m-%d' 2017-01-29 [root@Gin scripts]# date +%Y-%m-%d 2017-01-29 [root@Gin scripts]# date +%m/%d/%y 01/29/17 |
6: 设置系统时间
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[root@Gin scripts]# date -s "2016-11-11 00:00:00" Fri Nov 11 00:00:00 CST 2016 [root@Gin scripts]# date Fri Nov 11 00:00:05 CST 2016 |
7：请给出如下格式的date命令，如：11-02-26。再给出实现按周输出，如：周六为6，请分别给出命令
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[root@Gin scripts]# date +%y-%m-%d 17-01-29 [root@Gin scripts]# date +%F 2017-01-29 [root@Gin scripts]# date "+%Y-%m-%d %H:%M:%S" 2017-01-29 10:57:02 |
生产场景中常用时间格式来打包数据：
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[root@Andy andy]# tar zcvf etc-$(date +%F).tar.gz /etc [root@Andy andy]# tar zcvf etc-`date +%F`.tar.gz /etc |
解析命令方法：反引号，或$()，如上
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[root@Andy andy]# date +%w ##显示周，0-6 3 显示过去与未来时间： [root@Andy andy]# date +%F 2016-11-16 [root@Andy andy]# date +%F -d "-1day" 2016-11-15 [root@Andy andy]# date +%F -d "+2day" 2016-11-18 [root@Andy andy]# date +%F -d "+24hour" 2016-11-17 [root@Andy andy]# date +%F-%H -d "+2hour" 2016-11-16-14 |
引用：http://www.cnblogs.com/ginvip/p/6539393.html
细节影响成败，感谢 琴酒网络 的总结整理。