SYSTEMD-BOOT-RANDOM-SEED.SERVICE(8) systemd-boot-random-seed.service systemd-boot-random-seed.service - systemd-boot-random-seed.service systemd-boot-random-seed.service EFI (ESP) . systemd-boot(7) UEFI ( systemd-stub(7) ) (RNG) . . ' ' EFI NVRAM . . : ESP . EFI . systemd-boot-random-seed.service bootctl random-seed ESP . [1]. bootctl(1) . systemd-boot-random-seed.service systemd-random-seed(8). ( systemd-boot(7) systemd-stub(7)) . ( ). . . . : 1. UEFI systemd-boot(7) systemd-stub(7) ESP . . 2. systemd-random-seed.service . 3. systemd-boot-random-seed.service . . systemd(1), random(4), bootctl(1), systemd-boot(7), systemd-stub(7), systemd-random-seed.service(8) 1. https://systemd.io/BOOT_LOADER_INTERFACE 3 . . : . systemd 260.1 SYSTEMD-BOOT-RANDOM-SEED.SERVICE(8)