Bash script to send your IP via Pushover

pushover.sh

#!/bin/bash

IP=`hostname -I | awk '{print $1}'`
MESSAGE="Pi ${HOSTNAME} fully booted. New IP: $IP"
TITLE="`whoami`@${HOSTNAME}"

APP_TOKEN="YOUR_APP_TOKEN_HERE"
USER_TOKEN="YOUR_USER_TOKEN_HERE"

wget https://api.pushover.net/1/messages.json --post-data="token=$APP_TOKEN&user=$USER_TOKEN&message=$MESSAGE&title=$TITLE" -qO- > /dev/null 2>&1 &

I use this to send the IP of my Raspberry Pi via Pushover to my phone so that I can connect via SSH to it.
To implement this, you have to do the following.

1. Copy the gist to /home/YOUR_HOSTNAME/pushover.sh
2. Make the gist executable with sudo chmod 755 /home/YOUR_HOSTNAME/pushover.sh
3. Test it out with /home/YOUR_HOSTNAME/./pushover.sh
4. Create a new service with
   1. sudo nano /etc/systemd/system/pushover-ip.service
   2. Copy the following into this file:

# Bash script sending IP upon reboot via Pushover
# /etc/systemd/system/pushover-ip.service

[Unit]
Description=Bash script to send IP upon reboot via Pushover
After=network-online.target
Wants=network-online.target

[Service]
User=pi
Group=pi
Type=forking
ExecStart=/home/YOUR_HOSTNAME/./pushover.sh
KillMode=process

[Install]
WantedBy=multi-user.target

1. Disable IPv6 (otherwise systemd will execute your script before IPv4 is established)
   1. sudo nano /etc/sysctl.d/local.conf
   2. Copy the following into it: net.ipv6.conf.all.disable_ipv6=1
2. Enable the network-online service: sudo systemctl enable systemd-networkd-wait-online.service
3. Enable your service with sudo systemctl enable pushover-ip.service
4. Test it out with: sudo shutdown -r now