Record the time of Shell cancellation each time

A friend wants to log out of shell every time a few days ago. He can add the following command to the. bash_logout file:

date -d today +"%Y-%m-%d %H:%M:%S" >> /var/log/logout 

The test is as follows:

Open two windows, one of which is to view the current time, and the other exit to exit the shell. Check that the second line of the generated/var/log/logout file is the time I exited.

The time output commands in other formats are as follows:

# Date-d today + "% Y-% m-% d"
2013-02-07
# Date-d today + "% Y _ %-m _ %-d"
2013_2_7
# Date-d today + "% Y-% m-% d % T"
2013-02-07 22:42:24
# Date-d today + "% Y-% m-% d % H: % M"

# Date-d today + "% Y-% m-% d % H: % M: % S"
2013-02-07 22:42:35

The detailed usage of the date command is as follows:

Date Command Parameters

• -D,-date = STRING: display the time specified by STRING

• -F,-file = DATEFILE, similar to the-date parameter, shows the time of each row in the DATEFILE file.

• -ITIMESPEC,-iso-8601 [= TIMESPEC] displays date/time in ISO 8601 format. TIMESPEC is one of the following values: "date" (only display date), "hours", "minutes", and "senconds" (display time precision). The default value is "date ".

• -R,-reference = FILE: displays the last modification time of the FILE.

• -R,-the rfc-2822 displays time in RFC-2822 compatible Date Format

• -S,-set = STRING is set to STRING

• -U,-utc,-universal Display or set to Coordinated Universal Time Format

Date command output display format

• % Characters %

• % A abbreviation of a week (Sun .. Sat)

• % A full name of the Week (Sunday .. Saturday)

• % B (Jan .. Dec)

• % B full name of the month (January... December)

• % C date and time (Sat Nov 04 12:02:33 EST 1989)

• % C Century (excluding the sum after 100) [00-99]

• % D the day of the month (01 .. 31)

• % D Date (mm/dd/yy)

• % E the day of a month (1 .. 31)

• % F date, same as % Y-% m-% d

• % G year (yy)

• % G year (yyyy)

• % H is the same as % B

• % H hour (00 .. 23)

• % I hour (01 .. 12)

• % J the day of the year (001 .. 366)

• % K hour (0 .. 23)

• % L hour (1 .. 12)

• % M month (01 .. 12)

• % M minutes (00 .. 59)

• % N line feed

• % N nanoseconds (000000000 .. 999999999)

• % P AM or PM

• % P am or pm

• % R 12-hour time (hh: mm: ss [AP] M)

• % R 24-hour system time (hh: mm)

• % S seconds starting from 00:00:00 UTC

• % S seconds (00 .. 60)

• % T Tab

• % T in 24-hour format (hh: mm: ss)

• % U day of the week (1 .. 7); 1 indicates Monday

• % U the week of the year, and Sunday is the first day of the week (00 .. 53)

• % V the week of the year. Monday is the first day of the week (01 .. 53)

• % W the day of the week (0 .. 6); 0 indicates Sunday

• % W the week of the year, and Monday is the first day of the week (00 .. 53)

• % X date (mm/dd/yy)

• % X time (% H: % M: % S)

• % Y year (00 .. 99)

• % Y year (1970 ...)

• % Z RFC-2822 style numeric format Time Zone (-0500)

• % Z Time Zone (e.g., EDT). If the time zone cannot be determined, it is null.