#!/bin/bash

n=2

for (( k=0; k<$n; k++ )); do
    for i in $(ls $k); do
        a=`cat $k/$i | iconv -f CP1251 -t UTF-8 - | grep -c "Ошибка"`
        if [[ "$a" -eq "0" ]] ; then
            echo "$i" >> $1
        fi
    done
done