freebsd-rustdate cron
cron will sleep a random amount to offset within an hour, attempt a
fetch, and send an email to the owner of the MailTo email
address if there are updates to install. This should be pretty much the
same as freebsd-update’s cron command.
See also the check-fetch command; that can serve
much the same purpose, but is quicker and lighter-weight, both on your
system and on the server.
See Also
If you’re running interactively, you should be using fetch.
For a quick check of whether there seem to be any upgrades, use
check-fetch.