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lang-bash
bash,$RANDOM(initially a ksh feature) randomness was notoriously very bad and hardly usable.variables.c, made according to Park and Miller (1988). Bash 5.1 introduced SRANDOM (cryptographic-grade /dev or arc4, LC fallback) and got a new RNG for RANDOM (same one, but better folding to 16-bit); code for both is inlib/sh/random.c.