Date format within a script

[Simon R Wootton]

I'm taking today's date (eg 20/07/2004) and formatting it to a filename

example :

filename=`/bin/date +%y%m%d`

Output : 040720 - CORRECT!

However, I need to create a filename which consists of the date 2 DAYS AGO - ie. 040718

How do I amend the example above to say 'today's date minus 2 days' .....

10 points for the first correct answer!
Simon

[Fred Ruffet]

Hi !

Take a look at this one :
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=641246

(don't want to answer the same twice :)

Regards,

Fred

[Michael Tully]

I'm not near a system right now, but there is a fantastic tool called 'caljd' by our friend Clay Stephenson. If you use the word 'caljd' in the search engine, there are a pile of examples and in many there is an attachment of the script, which is written in perl. You could write a script and call in Clay's perl script at the appropriate time.

[Michael Tully]

Simon, You can get the script from these links.

http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x1fb33a7b3682d611abdb0090277a778c,00.html

or

http://www.cmve.net/~merijn/
The bottom of the page under "Other ITRC member contibutions".

Also in this thread there is an example right up your alley.
http://forums1.itrc.hp.com/service/forums/bizsupport/questionanswer.do?threadId=144178

[Muthukumar_5]

We can create using shell scipt also. Attached script will do that. Use crontab to run the script everyday after the starting of the day. dayinfo shell variable will contain 2 days back details.

I think i have seen the question today!? okie. see the shell in attachment. it will be useful.

[Muthukumar_5]

oops. fred ruffet gave that link. :-)

[A. Clay Stephenson · Accepted solution]

This is rather easy but you will need a fairly recent version of caljd.sh (>= 2.22) to truncate to 2-digit years.

PREVDATE=$(caljd.sh -s -y -C $(caljd.sh -p 2))

echo "Two days ago was ${PREVDATE}"

This will work across month and year boundaries as well.

Here is caljd.sh, Version 2.23: