Как я могу перейти в каталог на определенной глубине в текущем дереве?

echo "Start of message "

for file in "$@"
do

error=$(grep  'ERROR' ${file}.l)
phone=$(grep 'phone'  ${filee}.e)
invalid=$(grep  'invalid' ${file}.l)

echo -e  "${error} from ${file}\n ${phone} from ${file}\n  $invalid from ${file}\n\n"

done
echo -e "End of message \n"