this is my script:


TZ=`date +%Z`+24 ;a=`date +%Y-%m-%d`

cd /ednadtu3/u01/pipe/logs
for i in DBMaint.log
do

cat $i | grep $a >> /ednadtu3/u01/pipe/naveed/file12.txt
done
-------------------------------------------------------------------------------------

here i want to grep the 22nd hour of yesterday date, so that my script will grep only 22nd hour of yesterday date .but this script gives me all the hour of yesterday date