The "Mike Rubel" guide is a great one, and one that we have pointed customers at for years - especially for his explanations of "rsync snapshots". FWIW, we fin

The "Mike Rubel" guide is a great one, and one that we have pointed customers at for years - especially for his explanations of "rsync snapshots". FWIW, we finally wrote our own "rsync HOWTO", which is ironic, given that we ran rsync.net for almost a decade without one.[1] It is NOT rsync.net specific, which is why I am mentioning it here. Just our attempt at a simple, concise rsync HOWTO. It includes crontab explanations and examples, as well as all of the SSH key generation steps. "For extra safety against hack+delete+ransom attacks..." rsync.net customers get protection from this in two ways. First, all accounts have ZFS snapshots enabled by default, and ZFS snapshots are absolutely immutable. Only local root can destroy them, and only with a snapshot-specific destruction command. Second, we do server side "pulls" for all customers who request it, so you can have your backups at rsync.net without any credentials on your end for an attacker to use. [1] http://rsync.net/resources/howto/rsync.html http://rsync.net/resources/howto/rsync.html