Sponsored Content
Full Discussion: [ask]date variable
Top Forums Shell Programming and Scripting [ask]date variable Post 302471123 by 14th on Friday 12th of November 2010 04:33:42 AM
Old 11-12-2010
[ask]date variable

Is there date variable in bash?

for example, I have string 01-23-2010 (mm-dd-yyyy) or 23-01-2010 (dd-mm-yyyy).
How can I convert that string to date variable?

and how to do some math operation based on date?
for example, today is 12-11-2010.
I want to know date 100 days after today or 50 days before today.
Is there any simple calculation to do that?
thanks
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

using date in a variable name

Hi, Another nubie to Unix programming. I am using the Korne shell. I am trying to use the system date as a name in a tar file. Here is the code to explain. TODAY= date +%m%d%y echo $TODAY ### it echo's 021606 which is fine tar -cvf "$TODAY".tar *.std* I think you get the idea.... (11 Replies)
Discussion started by: ppopper
11 Replies

2. Shell Programming and Scripting

Date variable

Dear all, Today=`date +%d%m%y`` I want to decrease the date by 1. How would we do that. Thanks. (6 Replies)
Discussion started by: asadlone
6 Replies

3. Shell Programming and Scripting

convert date variable to doy variable

Hello: I have a script that requires the use of DOY (as a variable) instead of YY/MM/DD. I already obtained these parameters from downloaded files and stored them as variables (i.e. $day, $month, $year). Is there any simple script that I could incorporate in mine to do this job? Regards, ... (8 Replies)
Discussion started by: aabrego
8 Replies

4. Shell Programming and Scripting

How to check date variable according to the current date?

Hi folks, I need to write a script that should activate a process according to the current hour. The process should be activatet only if the hour is between midnight (00:00) and 07:00. How should I create the condition? Thanks in advance, Nir (2 Replies)
Discussion started by: nir_s
2 Replies

5. Shell Programming and Scripting

Date into variable

I'm trying to set var j = to date like this: j = $(date +%yy%m%d) echo $j But I'm missing something here. (3 Replies)
Discussion started by: dba_frog
3 Replies

6. Shell Programming and Scripting

LINUX ---> Add one date to a date variable

Hi All, I am trying to add one day to the busdt variable i am extracting from a file (DynamicParam.env). I am deriving the busdt as below. Is there any function which I can use to derive as below. If busdt=20120910, then the new derived variable value should be 20120911 If... (2 Replies)
Discussion started by: dsfreddie
2 Replies

7. Solaris

Setting Date Variable +1 date

I need to set a date varable within ksh that will set the date to the next day in the format 25-JUL-2013 - any help would be appreciated. (3 Replies)
Discussion started by: bjdamon
3 Replies

8. Shell Programming and Scripting

How to get date value by variable?

Hello All, I have one question: > cat abc.txt BrSp_IVR_Daily_Report_last_day_,date +'%Y-%m-%d',jim,969-PP-A,DAILY,/home/jim/reports/,YES BrSp_Status_Movements_C_,date +'%Y-%m-%d',jim,969-PP-A,DAILY,/home/jim/reports/,YES > cat akk.ksh #!/bin/ksh get_data() { OLDIFS=$IFS IFS="," ... (2 Replies)
Discussion started by: Ak1983
2 Replies

9. Shell Programming and Scripting

Convert a date stored in a variable to epoch date

I am not able to pass date stored in a variable as an argument to date command. I get current date value for from_date and to_date #!/usr/bin/ksh set -x for s in server ; do ssh -T $s <<-EOF from_date="12-Jan-2015 12:02:09" to_date="24-Jan-2015 13:02:09" echo \$from_date echo... (7 Replies)
Discussion started by: raj48
7 Replies

10. UNIX for Beginners Questions & Answers

How to replace a parameter(variable) date value inside a text files daily with current date?

Hello All, we what we call a parameter file (.txt) where my application read dynamic values when the job is triggered, one of such values are below: abc.txt ------------------ line1 line2 line3 $$EDWS_DATE_INSERT=08-27-2019 line4 $$EDWS_PREV_DATE_INSERT=08-26-2019 I am trying to... (1 Reply)
Discussion started by: pradeepp
1 Replies
CAL(1)							    BSD General Commands Manual 						    CAL(1)

NAME
cal, ncal -- displays a calendar and the date of Easter SYNOPSIS
cal [-3hjy] [-A number] [-B number] [[month] year] cal [-3hj] [-A number] [-B number] -m month [year] ncal [-3bhjJpwySM] [-A number] [-B number] [-s country_code] [[month] year] ncal [-3bhJeoSM] [-A number] [-B number] [year] ncal [-CN] [-H yyyy-mm-dd] [-d yyyy-mm] DESCRIPTION
The cal utility displays a simple calendar in traditional format and ncal offers an alternative layout, more options and the date of Easter. The new format is a little cramped but it makes a year fit on a 25x80 terminal. If arguments are not specified, the current month is dis- played. The options are as follows: -h Turns off highlighting of today. -J Display Julian Calendar, if combined with the -e option, display date of Easter according to the Julian Calendar. -e Display date of Easter (for western churches). -j Display Julian days (days one-based, numbered from January 1). -m month Display the specified month. If month is specified as a decimal number, it may be followed by the letter 'f' or 'p' to indicate the following or preceding month of that number, respectively. -o Display date of Orthodox Easter (Greek and Russian Orthodox Churches). -p Print the country codes and switching days from Julian to Gregorian Calendar as they are assumed by ncal. The country code as deter- mined from the local environment is marked with an asterisk. -s country_code Assume the switch from Julian to Gregorian Calendar at the date associated with the country_code. If not specified, ncal tries to guess the switch date from the local environment or falls back to September 2, 1752. This was when Great Britain and her colonies switched to the Gregorian Calendar. -w Print the number of the week below each week column. -y Display a calendar for the specified year. -3 Display the previous, current and next month surrounding today. -A number Display the number of months after the current month. -B number Display the number of months before the current month. -C Switch to cal mode. -N Switch to ncal mode. -d yyyy-mm Use yyyy-mm as the current date (for debugging of date selection). -H yyyy-mm-dd Use yyyy-mm-dd as the current date (for debugging of highlighting). -M Weeks start on Monday. -S Weeks start on Sunday. -b Use oldstyle format for ncal output. A single parameter specifies the year (1-9999) to be displayed; note the year must be fully specified: ``cal 89'' will not display a calendar for 1989. Two parameters denote the month and year; the month is either a number between 1 and 12, or a full or abbreviated name as speci- fied by the current locale. Month and year default to those of the current system clock and time zone (so ``cal -m 8'' will display a calen- dar for the month of August in the current year). Not all options can be used together. For example ``-3 -A 2 -B 3 -y -m 7'' would mean: show me the three months around the seventh month, three before that, two after that and the whole year. ncal will warn about these combinations. A year starts on January 1. SEE ALSO
calendar(3), strftime(3) HISTORY
A cal command appeared in Version 5 AT&T UNIX. The ncal command appeared in FreeBSD 2.2.6. The output of the cal command is supposed to be bit for bit compatible to the original Unix cal command, because its output is processed by other programs like CGI scripts, that should not be broken. Therefore it will always output 8 lines, even if only 7 contain data. This extra blank line also appears with the original cal command, at least on solaris 8 AUTHORS
The ncal command and manual were written by Wolfgang Helbig <helbig@FreeBSD.org>. BUGS
The assignment of Julian-Gregorian switching dates to country codes is historically naive for many countries. Not all options are compatible and using them in different orders will give varying results. BSD
March 14, 2009 BSD
All times are GMT -4. The time now is 06:08 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy