This will allow you to sent an email at startup on Ubuntu boot. You will need to ensure sendmail is setup and working (read my guide on How to send email via G Suite from Ubuntu in the cloud, setup an Ubuntu server in the cloud here (guide here)).

Create a  scripts folder

mkdir /scripts/

Create a file called /scripts/emailstartup.sh and add..

#!/bin/bash

echo "Dumping startup log";
journalctl -b0 --system _COMM=systemd --no-pager >/scripts/boot.log

#echo "Deleting old log file";
#rm -R /scripts/boot.zip

#echo "Zipping up Startup Log File.";
#zip -r -9 /scripts/boot.zip /scripts/boot.log

echo "Sending Email With Attachment";
# Ensure you have gmail or gsuite setup on your domain, guide here https://fearby.com/article/moving-a-cpanel-domain-with-email-to-a-self-managed-vps-and-gmail/
sendemail -f [email protected] -t [email protected] -u "Startup: $HOSTNAME server" -m "Attached are the startup logs for $HOSTNAME server" -s smtp.gmail.com:587 -o tls=yes -xu [email protected] -xp password -a /scripts/boot.log

optional: Uncomment lines above to attach a zip file instead of a log file (don’t forget to attach the zip instead of the log file in sendmail.)

Make the script file executable

sudo chmod +X /scripts/emailstartup.sh

Test the script

sudo /bin/bash /scripts/emailstartup.sh
Dumping startup log
Deleting old log file
Zipping up Startup Log File.
  adding: scripts/boot.log (deflated 91%)
Sending Email With Attachment
Sep 05 18:49:27 yourservernamehere sendemail[2606]: Email was sent successfully!

Add the following to crontab -e to ensure the script is executed 5 minutes after startup.

@reboot sleep 300 && /bin/bash /scripts/emailstartup.sh >> /dev/null 2>&1

On reboot, you will be emailed desired start-up information.

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