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Homework and Emergencies Emergency UNIX and Linux Support Convert string to date and add 1 Post 302697675 by pamu on Friday 7th of September 2012 07:56:26 AM
Old 09-07-2012
Bug

Quote:
Originally Posted by cns1710
Hi All,

I want to convert string in format YYYYMMDD(20120607) to date in unix and add 1 day to it and convert back to string in format YYYYMMDD. Please help.
If you want just tomorrow's date try this..

Code:
date --date="tomorrow" +%Y%m%d

If you want to do by addition only then try this..

Code:
#to Unix date Conversion-
$ date -d "20120607" +%s
1339041600
#add one day - add 86400 for one day..
$ expr 1339041600 + 86400
1339128000
#Get back to the previous format
$date +"%Y%m%d" -d @1339128000
20120608

 

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calendar(1)						      General Commands Manual						       calendar(1)

Name
       calendar - calendar reminder service

Syntax
       calendar [-]

Description
       The  command  consults the file `calendar' in the current directory and prints out lines that contain today's or tomorrow's date.  The com-
       mand recognizes most month-day dates, such as Dec. 7, december 7, 12/7, but it does not recognize dates formatted in the following ways:  7
       December  or  7/12.  If you give the month as * with a date, such as, * 1, that day in any month will do.  On weekends, specifying tomorrow
       extends through Monday.

       When an argument is present, the command searches through a user's calendar file in his login directory and sends him any positive  results
       by Normally this is done daily under control of

       The  calendar  file  is	first  run  through  the  C  preprocessor, to include any other calendar files specified with the #include syntax.
       Included calendars are shared by all users, and are maintained and documented by the local administration.

Options
       -    Functions for every user who has a calendar file in his login directory.

Restrictions
       The extended idea of tomorrow does not account for holidays.

Files
       calendar
       /usr/lib/calendar to figure out today's and tomorrow's dates
       /etc/passwd
       /tmp/cal*
       /lib/cpp, egrep, sed, mail as subprocesses

See Also
       at(1), cron(8), mail(1)

																       calendar(1)
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