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this post was submitted on 05 Aug 2025
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Probably still something Unix-like?
It's usually a stripped down version of the Linux kernel. See my post above where some cube sats use the kernel as an x86 bootloader.
They probably just fork BusyBox for most stuff, then strip it even more if they need to. Honestly just doing development with podman/docker targeting your architecture is the most obvious solution. Especially since you can adjust your environment or target multiple different possibile architectures (assuming the board itself is built by a contractor) without too much headache.
One of the interesting things about the rapidly-improving RISC-V architecture is that NASA has decided to standardize on it for future in-space systems. Of course who knows when or if that's going to happen now of course.
That's actually really sick. Makes sense too since RISC-V can be super power efficient and it's much easier to compile for. I'd guess that even as they get their budget cut, that part will remain operational. Too many private companies that will want to switch to RISC-V and will want to be able to just crib the tooling from a government agency.
Look up RTEMS and VxWorks if you're curious
This is indeed what I wanted to know. Thank you.