Intro

~ rngd  is this tool to change the Random number generator, which is related to several other tools/mechanisms for example: SSH keys, random PIDs for processes, TCP sequence numbers, and UUIDs.

  This daemon feeds data from a random number generator to the kernel’s random number entropy pool, after first checking the data to ensure that it is properly random.

rngd

Installing:

yum install rng-tools

   rngd is a program within rng-tools

Testing

rngd -f

  An interesting tutorial can be found here

REFS

Linux man