This shell script is written in Bourne Shell. This script checks for new mail message every one hour and displays to user appropriate message about arrival of new mail. To execute the Bourne-shell script named as checker.sh in you UNIX operating system in Bourne shell prompt type sh checker.sh and press enter.
Sample Code
# The script is a mail checker which checks for new mail message every one hour and displays relevant message about arrival of new mail to user