What do you use to automatically inform about the status of a remote server?

Question

linux

And also what channels for notification do you prefer (email, telegram, whatsapp, etc.)?
And maybe google provides some kind of service that allows you to send notifications to my phone without unnecessary software via api from the other side of the world?

Answer 1

Zabbix as monitoring, telegramm, email, sms as informants.

Answer 2

zabbix+grafana+iostat notification via sms and telegram