File rng-tools.service of Package rng-tools

[Unit]
Description=Start the rngd daemon
ConditionPathExists=/dev/hwrng

[Service]
CapabilityBoundingSet=CAP_SYS_ADMIN
ExecStart=/usr/sbin/rngd --foreground --fill-watermark=90% --feed-interval=1 

[Install]
WantedBy=multi-user.target