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cat /proc/sys/kernel/random/uuid [I ❤️ Linux] (feddit.org)

submitted 3 days ago* (last edited 2 days 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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[–] A_norny_mousse@feddit.org 3 points 2 days ago* (last edited 2 days ago)

while :; do cat /proc/sys/kernel/random/uuid > /dev/null; done

edit: on all cores for maximum "efficiency"