I am a newbie to scripting on Linux (Lubuntu), but I would like to make a script that runs a cron job only if my laptop is connected to my home wifi.

Is this possible?

I guess, I could do something with iwconfig and pull the ESSID from there with grep?

So far, I tried this and it seems to work:

#!/bin/bash
# CRON, connected to specific WIFI
clear
netid=HOFF216
if iwconfig | grep $netid
then 
    clear   
    echo "True, we are connected to $netid"
    rsync ...........
else
    clear       
    echo "False, we are not connected to $netid"
fi