Gary Stainburn <[email protected]> (Do 27 Aug 2015 18:22:16 CEST):
> Is there a simple way for a simple admin like me to get round this problem?

If it's missing entropy (you can check it on Linux systems with 
watching the output of
    sysctl kernel.random.entropy_avail 
)

And then try to feed the random generator. We use the rng-tools
(configuring /dev/urandom as a source for new entropy in
/etc/default/rng-tools). I newer installation we use the havegd.

Probably your board has a built-in hardware random generator and you
can make use of it.

At least it should help to locate the problem.

    Best regards from Dresden/Germany
    Viele Grüße aus Dresden
    Heiko Schlittermann
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