时间管理
2022年4月19日大约 2 分钟
时间管理
date 命令
date
命令用于输出当前时间
$ date
2016年 03月 14日 星期一 17:32:35 CST
date
命令后面用加号(+
)指定显示的格式。
$ date +%d_%b_%Y
10_Sep_2018
$ date +%D
09/10/18
$ date +%F-%T
2018-09-10-11:09:51
完整的格式参数如下。
- %a 星期名的缩写(Sun)
- %A 星期名的全称(Sunday)
- %b 月份的缩写(Jan)
- %B 月份的全称(January)
- %c 日期和时间(Thu Mar 3 23:05:25 2005)
- %C 世纪,就是年份数省略后两位(20)
- %d 一个月的第几天(01)
- %D 日期,等同于
%m/%d/%y
- %e 一个月的第几天,用空格补零,等同于
%_d
- %F 完整的日期,等同于
%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 等同于
%b
- %H 小时(00..23)
- %I 小时(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 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 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)
- %😒 +hh:mm numeric timezone (e.g., -04:00)
- %:😒 +hh:mm:ss numeric time zone (e.g., -04:00:00)
- %Z alphabetic time zone abbreviation (e.g., EDT)
cal 命令
cal
命令用于显示日历。不带有参数时,显示的是当前月份。
$ cal
三月 2016
日 一 二 三 四 五 六
1 2 3 4 5
6 7 8 9 10 11 12
13 14 15 16 17 18 19
20 21 22 23 24 25 26
27 28 29 30 31