Linux command
getrandom 命令
文本
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常用示例
Get random bytes (shell)
head -c [16] /dev/urandom | xxd
Get random bytes (C function)
getrandom(buffer, length, flags)
说明
getrandom() is a Linux system call that fills a buffer with random bytes from the kernel's random number generator. It's the recommended interface for obtaining random data in programs. Unlike reading from /dev/urandom, getrandom() blocks during early boot until the entropy pool is initialized, ensuring strong randomness.
FAQ
What is the getrandom command used for?
getrandom() is a Linux system call that fills a buffer with random bytes from the kernel's random number generator. It's the recommended interface for obtaining random data in programs. Unlike reading from /dev/urandom, getrandom() blocks during early boot until the entropy pool is initialized, ensuring strong randomness.
How do I run a basic getrandom example?
Run `head -c [16] /dev/urandom | xxd` in a terminal, then adjust file names, paths, flags, or remote targets for your system.
Where can I find more getrandom examples?
This page includes 2 examples for getrandom, plus related commands for nearby Linux tasks.