Some information I missed on the Internet:
Or: How to setup a secure, chrooted, rsync-enabled sftp server.
Especially private servers usually experience very few access during the day - so why not let them suspend in order to save some resources?
Find out here why and how to set up an automatically suspending and waking server.
A watchdog featuring quick setup, configuration and deployment.
It is written in pure Python, it does not require a database and relies on cron for job execution and sending emails.