Send message notification Telegram on boot

Requeriments

• Raspberry Pi / NanoPi
• Raspbian OS / DietPi / ARMbian
• Token and chat_id of your telegram bot, you can request them here from Telegram App:
• Bot token: https://t.me/botfather
• Chat_ID: https://t.me/myidbot

Install packages

sudo apt update
sudo apt upgrade -y
sudo apt curl -y

Edit hello.service file to change the path where you have the hello.sh script.

ExecStart=/usr/bin/bash	/root/hello.sh

Copy the hello.service and assign it the permissions 0644

cp hello.service /etc/systemd/system/
chmod 0644 /etc/systemd/system/

Restart service, and enabled

systemctl daemon-reload
systemctl enable hello.service

Edit the script hello.sh, to add your bot token, and your chat_id, rename the chosen script to hello.sh

TOKEN_BOT="YOUR_TOKEN_BOT"
TOKEN_ID="YOUR_TOKEN_CHAT"

Assign it the permissions a+x

chmod a+x /root/hello.sh

Ready!