A common complaint from Raspberry Pi owners is when running headless (no monitor or keyboard). If the Pi reboots then you lose your login session and often the previous IP address.
Using a something.local hostname sometimes works, but knowing the IP address is often more useful.
Here is a quick Python script to add to your rc.local file so it emails you on bootup.
Code
In this script I am using the Mailgun API so the message is less likely to end up in spam. You get a ton of free emails with Mailgun so it will not cost you a penny.
Add a text file containing your API key to your directory and call it mailgun-api.txt – that way you don’t need to store the key in your script.
import subprocess import requests # load API key from file inFile = open('/home/pi/mailgun-api.txt', 'r') api_key = inFile.readline().rstrip() inFile.close() # get host and IP this_host = subprocess.check_output("hostname", shell=True).rstrip() IP_line = subprocess.check_output("hostname -I", shell=True).rstrip() # send via Mailgun def send_message(): return requests.post( "https://api.mailgun.net/v3/YOURMAILGUNHOST.mailgun.org/messages", auth=("api", api_key), data={"from": "Bot <[email protected]>", "to": ["[email protected]"], "subject": "MY IP: " + IP_line, "text": this_host + " = host and " + IP_line + " is my IP!"}) print send_message()