.Default configuration now disables jitter entropy source in `rng-tools` The jitter entropy source is now disabled by default in `rng-tools`. Modern CPUs provide a hardware entropy source, and most virtual machines offer the `/dev/hwrng` device as an entropy source from the virtual host. In these environments, the jitter entropy source consumes unnecessary CPU cycles. For older hardware without a hardware entropy source, you can explicitly enable the jitter entropy source in `/etc/sysconfig/rngd`. As a result, the `rngd` daemon no longer consumes CPU cycles unnecessarily on systems that have hardware entropy sources.