dialog.sh

zenity --info --text="Hello World!"
notify-send "Hello World!"

dialog --title "Delete file" \
--backtitle "Linux Shell Script Tutorial Example" \
--yesno "Are you sure you want to permanently delete \"/tmp/foo.txt\"?" 7 60
 
# Get exit status
# 0 means user hit [yes] button.
# 1 means user hit [no] button.
# 255 means user hit [Esc] key.
response=$?
case $response in
   0) echo "File deleted.";;
   1) echo "File not deleted.";;
   255) echo "[ESC] key pressed.";;
esac
clear
echo "Scanning TCP ports..."
for p in {1..65535}
do
  (echo >/dev/tcp/localhost/$p) >/dev/null 2>&1 && echo "$p open"
done