I would like one of my hosts to broadcast occasional periodic signals to a shell script running on other host(s) on the same LAN.
I'm currently reading about various IoT protocols, but I'm wondering what the more traditional approaches were for this kind of messaging.
Ideally, I'd want some...
As root, I can examine the characteristics of all IPC shared memory segments. But is there a way to see them all that's more straightforward than throwing a Brazillion segment IDs at the wall to see which ones stick, as below?
I have to run many instances of PostgreSQL in different jails. And it seems it's not currently possible to run PostgreSQL in a jail without setting sysvipc_allow="YES" in the jail config.
(Or is it? I stumbled onto this: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=48471 where someone...