É para isso que serve o select
.
PS3="Would you like to input some text? <Y/N> ]"
select choice in "Y" "N"; do
case $choice in
"Y")
echo -n "Please input some text >"
read input
echo "$input"
break
;;
"N")
echo "Very well."
break
;;
*)
echo "Invalid response."
;;
esac
done