Ubuntu

loop=y
while [ "$loop" = y ]
do
clear
tput cup 5 15
echo -n "People Database"
echo -n "===================================="
tput cup 8 12
echo -n "L-Print Last Names"
tput cup 9 12
echo -n "F-Print First NAmes"
tput cup 10 12
echo -n "C-Print First Name, Last Name sorted by city"
tput cup 11 12
echo -n "S-Print First Name, Last Name, State sorted by state"
tput cup 12 12
echo -n "Q-Exit the program : "
tput cup 12 32
read value || Continue
 case "$value" in
   [Ll])  ./lastnames ;;
   [Ff]) ./firstnames ;;
   [Cc]) ./sort_city ;;
   [Ss]) ./sort_state ;;
   [Qq]) exit ;;
   *) tput cup 14 4 ; echo "Invalid choice"; read value ;;
 esac
done

bash -x