shell - Getting previous day's date in Unix -


i using following code assign previous day's date variable yesterday:

yesterday=`tz=gmt+24 date +%y%m%d`; echo $yesterday;

the value assigned correctly when execute command during morning hours. during night hours (around 9 pm), not getting previous day date, same date today.

my server located in pdt timezeone. tried "tz=pdt+24" assigning, got same result.

fyi, using solaris 5.10.

what can reason bizarre situation?

i cannot exact test on solaris. on linux works getting last day(yesterday):

kent$ date -d'yesterday' +%y%m%d 20130520

so type "yesterday", don't have special date. cool, isn't it?


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