UNIX for Dummies Questions & Answers

Hi Guys.

I am very new to UNIX.
I need to get yesterdays and tommorows date given todays date.
Which command and syntax do i use in basic UNIX shell.

Thanks.

How depends on which shell and which specific operating system version you are using.

If you are using a GNU/Linux OS and bash then the date -d option is probablly the way to go.
Look in the FAQ on Date Arithmetic on this forum for further information

If you are using something like ksh93 date arithmetic is built in

Code:

$ date
Fri Jul 11 05:21:56 EDT 2008
$ printf "%T\n" "yesterday"
Thu Jul 10 00:00:00 EDT 2008
$ printf "%T\n" "tomorrow"
Sat Jul 12 00:00:00 EDT 2008
$

Hi Thanks for the response.

My script is as follows

#!/bin/sh

isql -U$2 -S$5 -w 200 -o/u/ap/summary << xxx
$3
use $4
go
selec *
from table where label in ($1)
and flag=0 and exercise( "E") and deal_date between "$6" and "$7"

go
xxx

$6 and $7 are the values for yesterday and tommorow
and i want them to be calculated from todays date before they are used by the script.

Thanks