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Shell Programming and Scripting

Date subtraction

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# 1  
Old 01-10-2010
Date subtraction
hi,

i set up a script on my server to do a particular task once files from an external system are ftpd in the format compaq_20100110 (YYDDMM). Interestingly, the source of ftp is sending the files in the format e.g 20100109 i.e. previous date and for some reason this fails.kindly see my script below and see how i can remedy this:

Code:
#!/bin/ksh
# set -vx
BonusActivation_File=/export/home/laptop/hp/compaq_`date '+%Y%m%d'`.txt
date=`date '+%Y%m%d'`
num=`cat /export/home/laptop/hp/compaq_$date.txt|wc -l`
ntotal=0
cat $BonusActivation_File | cut -d , -f2  | while read LINE
do
ntotal=`expr $ntotal \+ $LINE`
done
ntotal=` expr $ntotal \* 10`
print $num,$ntotal,UNT,200,1 > /var/opt/unix/ftp/linux/adjustment/BATCH_ADJUST_`date '+%Y%m%d'`_10000.DAT
cat /export/home/laptop/hp/compaq_`date '+%Y%m%d'`.txt | nawk -F "," -v v1=",,,,1,5," -v v2="0," '{print $1v1$2v2}' >> /var/opt/unix/ftp/linux/adjustment/BATCH_ADJUST_`date '+%Y%m%d'`_10000.DAT


thanx in advance,
Last edited by pludi; 01-10-2010 at 11:19 AM.. Reason: Added code tags
# 2  
Old 01-10-2010
check this post
https://www.unix.com/shell-programmin...dd-format.html
# 3  
Old 01-10-2010
if you have gnu date, try:
Code:
date --date="yesterday"

another option is:
Code:
TZ=GMT+24 date

Also visit this, must be useful.
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