Beep when online again.

Beep.online.sh

beepwhenup () { 
 echo 'Enter host you want to ping:'; read PHOST;
 if [[ "$PHOST" == "" ]]; 
then exit; fi; 

while true; 
  do ping -c1 -W2 $PHOST 2>&1 >/dev/null; 
  if [[ "$?" == "0" ]]; 
    then for j in $(seq 1 4); 
       do beep; 
    done; 
    ping -c1 $PHOST; 
    break; 
   fi; 
done; }