cat /proc/sys/kernel/random/uuid [I ❤️ Linux]
cat /proc/sys/kernel/random/uuid [I ❤️ Linux]
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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Yeah but please don't actually use this. Use a proper UUID library that works cross-platform and lets you choose the UUID type and can be seeded etc.
Can you explain?
Use for what?
Also it is being seeded, according to the fileurandom_min_reseed_secswhich is also writeable. Here are the other files:-r--r--r-- 1 root root 0 25. 5. 11:13 boot_id -r--r--r-- 1 root root 0 25. 5. 11:19 entropy_avail -r--r--r-- 1 root root 0 25. 5. 11:19 poolsize -rw-r--r-- 1 root root 0 25. 5. 11:19 urandom_min_reseed_secs -r--r--r-- 1 root root 0 25. 5. 11:19 uuid -rw-r--r-- 1 root root 0 25. 5. 11:19 write_wakeup_thresholdedit: the type is always DCE/random