Shell Programming and Scripting

#!/bin/ksh

i=1
j=1
while [[ $i -lt 1025 || $j -lt 2049 ]]
do
    awk "NR==$i,NR==$i+1" wa1009wd00FF.dat >> final_writeFFFFh.txt
    awk "NR==$j,NR==$j+3" writeFFFFh_to_dpram.txt >> final_writeFFFFh.txt
    let i=i+2
    let j=j+4
done

awk '
    {
        print ; getline ; print 
        for (i=1; i<=4 && getline < "writeFFFFh_to_dpram.txt"; i++) { print }
    }
' wa1009wd00FF.dat > final_writeFFFFh.txt

la=`cat a | wc -l`
lb=`cat b | wc -l`
nawk -v a="$la" -v b="$lb" 'BEGIN{n=1}
{
if (NR==FNR)
{
	if(NR%2!=0)
	{
		t=NR/2-0.5
	}
	tt=NR+t*3
	arr[tt]=$0
}
else
{
	t=FNR+n*2
	arr[t]=$0
	if(FNR%3==0)
		n=n+1
}
}
END{
	sum=a+b
	for(i=1;i<=sum;i++)
		print arr[i]
}' a b

cat file2 | paste file1 - - | paste - - | awk '{print $1,$4,$2,$3,$5,$6}' | tr " " "\n"