telegram_notifier.sh

#!/bin/sh

TG_BOT_KEY="YOUR_KEY_FROM_BOTFATHER_HERE"

# TODO: parse response and return non-zero code on error
function telegram_notify(){ curl -d "{\"chat_id\": $1, \"text\": \"$2\", \"parse_mode\": \"$3\"}" -H "Content-Type: application/json" -s -X POST https://api.telegram.org/bot$TG_BOT_KEY/sendMessage >/dev/null ; }

# you can get chat id from @getidsbot bot: https://t.me/getidsbot
# before sending message from bot to user/channel, you should start your bot there

telegram_notify $CHAT_ID_HERE "plain text"
telegram_notify $CHAT_ID_HERE "_Markdown_ *text*" MarkdownV2