shell 循环比对变量是否相等

count=0
cat old_info|while read i
do
cat new_info|while read j
do
count=`expr $count + 1`
echo $count
if [[ $i = $j ]];then
echo "compare response_info pass"

else
echo "Compare response_info error"
echo $i
echo $j

fi
done
done
这个脚本会把i依次和j的每一个值比较，我想要的结果是 每次循环 i和j比较 然后 i 和j各循环一次 然后i和j在比较请问如何改动

awk '{
if(FILENAME=="'old_info'")
{
Filekey[$1]=$0
}
if(FILENAME=="'new_info'")
{
if($0 in Filekey)
{
print $0 >>"sameline"
print "compare response_info pass" >>"sameline"
}
else
{
print $0 >>"diffline"
print "Compare response_info error" >>"diffline"
}
}
}' old_info new_info

awk 'NR==FNR{a[FNR]=$0;next} $0==a[FNR]{print "compare response_info pass "} $0!