topic Re: yesterday's date in Operating System - HP-UX

yesterday's date

Catherine Forget — Mon, 05 Apr 2004 13:58:56 GMT

Hi,

Is there an easy way to get yesterday's date (yyyymmdd)with the date command?
Thanks

Re: yesterday's date

Steven E. Protter — Mon, 05 Apr 2004 14:02:20 GMT

A. Clay Stephenson's date program comes to mind.
http://www.hpux.ws/merijn/caldj-2.3.sh

Perl
http://www.hpux.ws/merijn/caldj-2.2.pl

SEP

Re: yesterday's date

A. Clay Stephenson — Mon, 05 Apr 2004 14:05:46 GMT

You can do tricks with the TZ environment vaiable but the behavior is only defined in the range 0-24 so if your hour offset falls outside that range the behavior may work or it may not and could break at the next patch. It might also work for some timezones and not others. If you want something that will work everywhere then:

YESTERDAY=$(caljd.sh -s -y $(caljd.sh -p 1))
echo "Yesterday was ${YESTERDAY}"

Invoke as caljd.sh -u for full usage.

Re: yesterday's date

Hazem Mahmoud_3 — Mon, 05 Apr 2004 14:22:45 GMT

Here is a portion of a script that I used before. I'm almost certain there's a better way of doing it, but just another option and it might give you some ideas:

chop($day = `date \"+%d\"`);
chop($month = `date \"+%m\"`);
chop($year = `date \"+%y\"`);
$prevday = $day - 1;
if ($prevday == 0) #if first of month
{
if (($month==1) || ($month==3) || ($month==5) || ($month==7) || ($month==8) || ($month==10) || ($month==12))
{
$prevday = 31;
}
else
{
$prevday = 30;
if ($month == 2)
{
$prevday = 28;
}
}
}
if ($prevday =~ /^\d{1}$/) #format day to be 2 digits
{
$prevday = "0$prevday";
}

-Hazem

Re: yesterday's date

Nicolas Dumeige — Mon, 05 Apr 2004 14:57:32 GMT

(with oracle : select to_char(sysdate-1,'yyyymmdd') from dual;)

Re: yesterday's date

Hein van den Heuvel — Mon, 05 Apr 2004 15:47:25 GMT

perl -e '$yesterday = localtime(time-24*60*60),print "$yesterday\n"'

perl -e '$yesterday = localtime(time-86400),print "$yesterday\n"'

Re: yesterday's date

H.Merijn Brand (procura — Mon, 05 Apr 2004 16:00:07 GMT

From the FAQ at my site:

--8<---
How do I print Yesterday?

d3:/ 102 > echo 'Yesterday'
Yesterday
d3:/ 103 > perl -le 'print scalar localtime time - 86400'

Or use A.Clay Stephenson's date hammer, which can also be used for more complicated actions from the command line, as will using the modules Date::Calc or Date::Manip with Perl.
-->8---

my HP ITRC site pages can be found at

Singapore https://www.beepz.com/personal/merijn/#FAQ
Rotterdam http://www.cmve.net/~merijn/#FAQ
Seattle http://www.hpux.ws/merijn/#FAQ

And it also hosts caldj - both versions - in the last section of the page

Enjoy, have FUN! H.Merijn

Re: yesterday's date

Francisco J. Soler — Mon, 05 Apr 2004 17:56:45 GMT

Hi Catherine,
If you download the date command from gnu coreutils the yesterday's date is very easy to obtain,

date --date yesterday +%F
you get the date in yyyy-mm-dd
or
date --date yesterday %Y%m%d
you get the date in yyyymmdd

I've tried with some tricky dates like:
date --date '01 march 2004 1 day ago'
and
date --date '01 march 2003 1 day ago'
and
date --date '01 Jan 2003 1 day ago'
and so on, the result is good.

You can download the date command from gnu coreutils from the software porting center:
http://hpux.cs.utah.edu/hppd/hpux/Gnu/coreutils-5.2.0/

Frank.

Re: yesterday's date

Francisco J. Soler — Mon, 05 Apr 2004 17:59:51 GMT

Hi again,
I've made a mistake the sentence:
date --date yesterday %Y%m%d
must be
date --date yesterday +%Y%m%d

sorry
Frank.

Re: yesterday's date

V.Tamilvanan — Mon, 05 Apr 2004 22:25:48 GMT

Hi,

Look into this below link.

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=222968

Re: yesterday's date

Catherine Forget — Tue, 06 Apr 2004 07:24:33 GMT

Hi Steven,
The link you gave me :
http://www.hpux.ws/merijn/caldj-2.3.sh
is not accessible. Is there another way to get the script?

Thanks very much

Re: yesterday's date

H.Merijn Brand (procura — Tue, 06 Apr 2004 07:32:56 GMT

Any of the other two of my site should do:

My HP ITRC site pages can be found at

Singapore https://www.beepz.com/personal/merijn/caldj-2.3.sh
Rotterdam http://www.cmve.net/~merijn/caldj-2.3.sh
Seattle http://www.hpux.ws/merijn/caldj-2.3.sh

Enjoy, have FUN! H.Merijn

Re: yesterday's date

H.Merijn Brand (procura — Tue, 06 Apr 2004 08:06:31 GMT

Sorrrrry. The file was misnamed on the server.

All links should work again in a few hours. cmve is correct again

Enjoy, Have FUN! H.Merijn [ don't forget about the etiquette and assign point to _all_ answers. 0 is better than not assigned ]

Re: yesterday's date

RAC_1 — Tue, 06 Apr 2004 08:17:25 GMT

YESTERDAY=$(TZ=$(date +%Z)+24; date '+%b %e')

Anil

Re: yesterday's date

H.Merijn Brand (procura — Wed, 07 Apr 2004 02:29:40 GMT

Sorry to A.Clay!

I have now corrected *all* misspelled references to caljd.sh, caljd.pl, caljd-2.3.sh, caljd-2.2.pl, and caljd-2.2.sh on my site

Most were spelt as caldj :(

Catherine, please do not Forget to assign points to _all_ posts. 0 (or no) points is OK, but don't leave them unassigned.

Enjoy, Have FUN! H.Merijn