Write a shell script that prints the message "Good Morning", "Good After Noon", "Good Evening", or " Good night " according to the system's time.
#!/bin/bash
t=""
t=`echo $(date +"%H") `
if [ $t -le 10 -a $t -ge 6 ]
then
echo " Good morning "
elif [ $t -gt 10 -a $t -le 16 ]
then
echo " good after noon"
elif [ $t -gt 16 -a $t -le 20 ]
then
echo "good evening "
elif [ $t -gt 20 -a $t -le 5 ]
then
echo " good night "
fi
