#!/usr/bin/env bash

# read-menu: a menu driven system information program

clear

cat << EOF

Please Select:

1. Display System Information

2. Display Disk Space

3. Display Home Space Utilization

0. Quit

EOF

echo -n 'Enter selection [0-3]: '

read -r sel

case $sel in

0) echo "Program terminated.";;

1) echo "Hostname: $HOSTNAME"; uptime;;

2) df -h;;

3)

if [ "$UID" = 0 ]; then

echo "Home Space Utilization (All Users)"

du -sh /home/*

else

echo "Home Space Utilization ($USER)"

du -sh "$HOME"

fi

;;

*)

echo "Invalid entry." >&2

exit 1

esac