3 Seeding the random number generator by writing to /dev/urandom does not update the entropy count.
5 This utility makes the RNDADDTOENTCNT ioctl call needed to do this.
7 Used in startup scripts after initializing /dev/urandom with a presaved seed.
11 dd if=/path/to/some/random-seed-file of=/dev/urandom bs=512 count=1
13 /path/to/rdnaddtoentcnt <entropy-bit-count>
15 where entropy-bit-count is a number between 1 and (8 * 512) depending on how much you trust the seed file.