this post was submitted on 24 May 2025
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cat /proc/sys/kernel/random/uuid [I ❤️ Linux] (feddit.org)
submitted 1 week ago* (last edited 1 week ago) by A_norny_mousse@feddit.org to c/linux@programming.dev
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That's all. I just found this in a random script. Generates a random UUID every time it's called. I didn't know.

Of course I can also use uuidgen or pipe /dev/(u)random into something to get a random alphanumeric string - but this is built right into the kernel!

In /proc/sys/kernel/random/, there's also boot_id which ~~seems to do the same~~ is static, and some tweakable parameters.

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[–] Hamartiogonic@sopuli.xyz -1 points 1 week ago (13 children)

See also: /dev/null

It’s basically a black hole where you can throw anything.

[–] victorz@lemmy.world 9 points 1 week ago* (last edited 1 week ago) (12 children) 
cat /proc/sys/kernel/random/uuid > /dev/null
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