We help IT Professionals succeed at work.

get yesterdays date into a unix variable

mbergeby
mbergeby asked
on
3,277 Views
Last Modified: 2013-12-20
Hi,
I'm working in HP-ux 11 and I'm trying to get yesterdays date into a variable that I can use later on in a script.
I use the format:
DATE=`date '+%d-%b-%Y'`
which gives me i.e. 01-Jan-2007
I make it uppercase and gets it into a variable with
export Y_DATE=$(printf "%s\n" "$DATE" | tr '[a-z]' '[A-Z]')
which gives me 01-JAN-2007 as value in Y_DATE
The question is how can I get the result to be 31-DEC-2006 in Y_DATE??

Thankfull for any help
Comment
Watch Question

Hi Check out the following code:

#!/usr/bin/ksh
date '+%m %d %Y' |
{
read MONTH DAY YEAR
DAY=`expr "$DAY" - 1`
case "$DAY" in
        0)
           MONTH=`expr "$MONTH" - 1`
                case "$MONTH" in
                        0)
                           MONTH=12
                           YEAR=`expr "$YEAR" - 1`
                        ;;
                esac
        DAY=`cal $MONTH $YEAR | grep . | fmt -1 | tail -1`
esac
echo "Yesterday was: $MONTH $DAY $YEAR"
}
You can use this logic in your code!!

Commented:
Y_DATE=`TZ=CST+24 date '+%d-%b-%Y'`
Commented:
This one is on us!
(Get your first solution completely free - no credit card required)
UNLOCK SOLUTION

Author

Commented:
Thanks both!
nixfreak, your solution was very simple and effective and with the correct formating which was important for me, thanks again :-)

Gain unlimited access to on-demand training courses with an Experts Exchange subscription.

Get Access
Why Experts Exchange?

Experts Exchange always has the answer, or at the least points me in the correct direction! It is like having another employee that is extremely experienced.

Jim Murphy
Programmer at Smart IT Solutions

When asked, what has been your best career decision?

Deciding to stick with EE.

Mohamed Asif
Technical Department Head

Being involved with EE helped me to grow personally and professionally.

Carl Webster
CTP, Sr Infrastructure Consultant
Empower Your Career
Did You Know?

We've partnered with two important charities to provide clean water and computer science education to those who need it most. READ MORE

Ask ANY Question

Connect with Certified Experts to gain insight and support on specific technology challenges including:

  • Troubleshooting
  • Research
  • Professional Opinions
Unlock the solution to this question.
Join our community and discover your potential

Experts Exchange is the only place where you can interact directly with leading experts in the technology field. Become a member today and access the collective knowledge of thousands of technology experts.

*This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

OR

Please enter a first name

Please enter a last name

8+ characters (letters, numbers, and a symbol)

By clicking, you agree to the Terms of Use and Privacy Policy.