If you don't have GNU date, then another alternative is perl if you have that. From your input date, we need to split it up the values and feed them in:-
Code:
#!/bin/ksh
input_date=$1
in_yyyy="${input_date%????}" # Remove last four characters
in_dd="${input_date#??????}" # Remove lead four characters
in_mm="${input_date#????}" # Remove lead four characters
in_mm="${in_mm%??}" # Remove last two characters from previously split value
((temp_mm=$in_mm-1)) # Reduce month by one as epoch counts from 1/1/1970 as zero
# Get time in seconds since epoch
perl -e "use Time::Local; print timelocal(0,0,0,$in_dd,$temp_mm,$in_yyyy), ;" | read in_seconds
# Go back one day in seconds
((out_seconds=$in_seconds-86400))
# Display answer in required format
perl -e 'use POSIX qw(strftime);print scalar(strftime "%Y%m%d", localtime $ARGV[0]), "\n";' $out_seconds
I hope that this meets the brief you have given us. There may be smarter ways to read & split the input date, so I'm open to suggestions.
Obviously some validity checking on the input would be wise else you will get various horrible messages from the perl
I've put it in a script called 254222 (thread number) and tested it as shown:-
Hi,
I would like to find out how can i calculate a date which is 3 months ago. I intend to run a cron job on the 1st of every month, and calculate the month 4 months earlier from the date. For example, if today's date is 1st May 2007, i would like to return 012007( January 2007).
i can get... (1 Reply)
I want to calculate the date of next satureday of current date using shell script.
Suppose, today is 27-feb-08
I want to get the date of next satureday, which means 01-mar-08, in the formate '' YYMMDD ".
I do this in ksh..
Please tell me any type of command which help me out.
Thanks in... (3 Replies)
Hi guys,
I had a scenario...
1. I had to get the previous days date in yyyymmdd format
2. i had to create a file with Date inthe format yyyymmdd.txt format
both are different
thanks guys in advance.. (4 Replies)
Hello
I would like to help me create a script that:
Given a date, more precisely a year, one month and one day. must calculate the day after
-Input: Year, Month, Day
-Output: Next day the Year-Month-Day
thanks (9 Replies)
I am unable to get this KSH script to work. Can someone help. I've been told this should work with KSH93. Which I think I have on Solaris 10.
If I do a grep -i version /usr/dt/bin/dtksh I get
@(#)Version M-12/28/93d
@(#)Version 12/28/93
@(#)Version M-12/28/93
This is correct for... (5 Replies)
I need to get the next day's date of the user entered date
for example:
Enter date (yyyy/mm/yy):
2013/10/08I need to get the next day's date of the user entered date
Desired Output:
2013/10/09Though there are ways to achieve this is Linux or Unix environment (date command) ,I need to... (1 Reply)
How to get Julian date (Three digit) of a given date (Not current date)? I do not have root privilege - so can not use date -d. Assume that we have three variables year, month and date.
Thx (5 Replies)
I Have text like
XXX_20190908.csv.gz need to replace Only date in this format with current date every day
Thanks! (1 Reply)
Discussion started by: yamasani1991
1 Replies
LEARN ABOUT MINIX
date
DATE(1) General Commands Manual DATE(1)NAME
date - print or set the date and time
SYNOPSIS
date [-qsu] [[MMDDYY]hhmm[ss]] [+format]
OPTIONS -q Read the date from stdin
-s Set the time (implicit for -q or a date string)
-u Print the date as GMT
-t Use this number of seconds instead of current time
EXAMPLES
date # Print the date and time
date 0221921610 # Set date to Feb 21, 1992 at 4:10 p.m.
DESCRIPTION
With the -q flag or a numeric argument, date sets the GMT time and date. MMDDYY refers to the month, day, and year; hhmmss refers to the
hour, minute and second. Each of the six fields must be exactly two digits, no more and no less. date always display the date and time,
with the default format for the system. The -u flag request GMT time instead of local time. A format may be specified with a + followed
by a printf-like string with the following options:
%% % character
%A Name of the day
%B Name of the month
%D mm/dd/yy
%H Decimal hour on 2 digits
%I Decimal hour modulo 12 on 2 digits
%M Decimal minute on 2 digits
%S Decimal seconds on 2 digits
%T HH:MM:SS
%U Decimal week number, Sunday being first day of week
%W Decimal week number, Monday being first day of week
%X Same as %T
%Y Decimal year on 4 digits
%Z Time Zone (if any)
%a Abbreviated name of the day
%b Abbreviated name of the month
%c Appropriate date & time (default format)
%d Decimal day of the month on 2 digits
%e Same as %d, but a space replaces leading 0
%h Same as %b
%j Decimal dey of the year on 3 digits
%m Decimal month on 2 digits
%n Newline character
%p AM or PM
%r 12-hour clock time with AM/PM
%s Number of seconds since the epoch
%t Tab character
%w Decimal day of the week (0=Sunday)
%x Same as %D
%y Decimal year on 2 digits
SEE ALSO time(2), ctime(3), readclock(8).
DATE(1)
01-02-2015
