Shell Programming and Scripting

This script needs to find the uniq values.
but only the 1st 10 are being shown...the next 10 are fairly neglected

Code:

#!/bin/bash  
exec<test.dat
x=10
value=0
while [ $value -le 1000 ] 
do
value=`expr $value + 1`;
#echo $value;
val=`expr $value % $x`;
if [ $val -eq "0" ]
then
awk -v f="$value"  '( NR<=f){print $0}'| grep -oP '\d{4,}' | sort -nu|wc -l
x=`expr $x + 10`;
echo $x
fi
#echo $value
done

Of course it reads them only once. You re-open stdin to read from a file, and awk reads the whole of it in one go. Afterward, reading from stdin will always return EOF, unless it is again re-opened. Exiting awk as soon as your condition isn't true anymore might help.

Anyways, it looks like an overly complicated way to do what you want, and based on your IP address you might consider posting here instead.