SYSTEMD-RANDOM-SEED.SERVICE(8) systemd-random-seed.service (NAME) systemd-random-seed.service, systemd-random-seed - (SYNOPSIS) systemd-random-seed.service /usr/lib/systemd/systemd-random-seed (DESCRIPTION) systemd-random-seed.service . random(4) . $SYSTEMD_RANDOM_SEED_CREDIT . /var/lib/systemd/random-seed . initrd /var/. -- . systemd-boot(7) bootctl random-seed . . . . ( /dev/urandom ). : -- -- . . . : Safely Building Images[1]. Random Seeds[2] . (ENVIRONMENT) $SYSTEMD_RANDOM_SEED_CREDIT systemd-random-seed.service . : "force". false . true . "force" . 243. (SEE ALSO) systemd(1), random(4), systemd-boot(7), systemd-stub(7), bootctl(1), systemd-boot-random-seed.service(8) (NOTES) 1. Safely Building Images https://systemd.io/BUILDING_IMAGES 2. Random Seeds https://systemd.io/RANDOM_SEEDS systemd 261.2 SYSTEMD-RANDOM-SEED.SERVICE(8)