Write a shell script which whenever gets executed displays the message “Good Morning/Good afternoon /Good Evening “depending on the time at which the script is executed.

Code for Shell script which whenever gets executed displays the message “Good Morning/Good afternoon /Good Evening “depending on the time it get executed" in Unix / Linux / Ubuntu

check=`date +%H`
echo $check
if [ $check -ge 06 -a $check -le 12 ]
then
        echo "Good morning"
elif [ $check -ge 12 -a $check -le 17 ]
then
        echo "Good afternoon"else
        echo "Good evening"
fi