DH and random

[stefek143]

Hi.

When i've configured my freeradius i've seen 2 metods to create files DH and random:

first: 
DH:
openssl dhparam -check -text -5 512 -out dh
Random:
dd if=/dev/urandom of=random count=2

second:
DH:
date >/etc/1x/DH
Random
date > /etc/1x/random

And I wondering what is different in theory and practice? my freeradius is acting, but i wanna understand for what i need this two file and is it never mind when i use instead of first, second method.

THX for answers
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