One point I have noted in many postings related to installing Identity Suite components on Linux platforms is the step to increase the random number generation pool by setting up a symbolic link to urandom to replace the random binary. We have posted these two lines before:
> mv /dev/random /dev/random.orig
> ln -s /dev/urandom /dev/random
In many cases the random number generator daemon is not running, so the symbolic link will not have effect until the rngd process is started:
> service rngd start
You should also ensure the rngd daemon starts on reboot:
> chkconfig rngd on
While researching the transient nature of the symbolic link to /dev/urandom, I ran across this posting using a Google search (how to increase entropy in Centos 6.2? - CentOS ) "How to Increase Entropy in CentOS 6.2". The recommended permanent change is to set the rngd options as shown in the article by editing the /etc/sysconfig/rngd options file:
> # Add extra options here
> EXTRAOPTIONS="-r /dev/urandom"
The effect is the same as setting the symbolic link but not additional updates to udev configurations or similar techniques to make the symbolic link persist on reboot.