Linux systems normally save entropy for the next reboot, so in practice genuine low entropy only happens in two circumstances: on a brand new installation — this is especially a concern in embedded devices that generate a key the first time they're turned on; Second law: This law states that "all processes in nature tend to occur with an increase in entropy and the direction of change always lead to the increase in entropy." Third law: This law states that "The entropy of a perfect crystal of each element and a compound is zero at absolute zero." Chemical Interview Questions; Question 3.
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