[Unit] Description=Hardware RNG Entropy Gatherer Wake threshold service Before=rngd.service [Service] CapabilityBoundingSet=CAP_SYS_ADMIN AmbientCapabilities=CAP_SYS_ADMIN Type=oneshot RemainAfterExit=yes ExecStart=/bin/sh -c "PSIZE=$(cat /proc/sys/kernel/random/poolsize); let THRESH=$PSIZE*3/4; echo $THRESH>/proc/sys/kernel/random/write_wakeup_threshold; udevadm trigger --sysname-match=hw_random --settle" [Install] WantedBy=sysinit.target