The following works under SuSE 6.2 version of Linux.

date --date yesterday  +%m%d%y

I would incorporate it in something like:

#!/bin/bash
export TODAY=`date +%m%d%y`
export YESTERDAY=`date --date yesterday  +%m%d%y`
program_to_create_file > FILE$TODAY.txt
diff FILE$YESTERDAY.txt FILE$TODAY.txt
##EOF

"Mark A. Swope" wrote:
> 
> Sorry if this isn't the correct group for this...
> 
> I'm trying to write a short script that is going to be run as
> a cron job.  In it I want to create a file that is named something
> like "filenameYYYYMMDD.txt"    I can do this just fine.
> 
> However, in the script, I'd like to do a diff with the same file
> that was created the day before and I'm having trouble figuring out
> how to do that.
> 
> Can anyone give me an example or a pointer to a good example?
> 
> Many thanks and kindest regards,
> Mark Swope
> 
> ----------------------------------------------------------------------------
> ---------
> MilliHelen - n. The amount of Beauty required to launch 1 ship.
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