How to increase the entropy pool without using a keyboard or mouse?

Solution Verified - Updated -

Issue

  • The system is reporting that there is not enough entropy in the pool for SSL connections and other security-related applications.
  • How can I increase the entropy pool without using a keyboard or mouse?
  • Does the command rngd -r /dev/urandom -o /dev/random really help to resolve the low entropy issue?
  • Is it recommended to replace /dev/random with /dev/urandom in RHEL?
  • Is it advisable to change /dev/random to a softlink to /dev/urandom?

Environment

  • Red Hat Enterprise Linux
  • rng-tools (RHEL 6)
  • rng-utils (RHEL 5)
  • kernel-utils (RHEL 4)

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