$#/bin/bash /* check error script */ echo "try to find out some ! " # seach for the words which can be matched by regex [^a]*ce # and save the output to file "result" echo "the regex [^a]*ce can match the string(s): " > result grep '^[^a]*ce$' < < end > > result lance ace brace decide piece -endhere # check the existence of file "result" # send the content in "result" to your emailbox # $1 is replaced by your campusid ls mail $1@student. gsu. edu < result # $1 is replaced by your campusid echo "the result has been sent to ${1}@student. gsu. edu" echo "congratulations! you have corrected all the errors! "