previous date comman in unix (urgent)

nails October 3, 2011 at 15:45:03

Manipulating dates in vintage unix without benefit of a scripting languarge is difficult. You can manipulate the timezone variable, TZ, to get yesterday's date and then create and write to a file: #!/bin/ksh YESTERDAY=$(TZ=aaa24 date +%Y-%m-%d) echo $YESTERDAY echo "some text" > monitorBatch.log.$YESTERDAY This TZ thing is not portable, but this works on my Solaris 9 box. Your mileage may vary. Unix date arithmetic has been discussed a lot on this forum. Here is one of many example links in this forum that discusses TZ, the shift_date shell script, and a suite of shell scripts that does date arithmetic: http://www.computing.net/answers/un...

Hi nails... What does TZ=aaa24 means??

nails October 3, 2011 at 17:19:14

AAA24 is an offset from GMT for the TZ variable. Here is a description: http://www.mailarchive.ca/lists/com...

Hi, It' not working as when I added the same to a script wherin it runs at 2:00 AM every morning and needs to take in count of the previous days file in a folder. The date was caluclated for day before yesterday and the count also for the same. My system timezone is of UAE Tue Jul 3 10:24:17 GST 2012 Thanks and Regards, Gowri Shankar gowri.c91@gmail.com

nails July 3, 2012 at 06:38:38

As I said, TZ is not portable. Based on your description, I don't know what the problem is. If I were you, I'd consider using the shift_date shell script. I linked to it in my first reply.