When do you turn off your Ubuntu boxes?

[John]

norman wrote:
>>> I leave my box on most of the time. It is probably because I believe
>>> that there is more strain on components with switching on and off rather
>>> than running constantly. 
>>>       
>> I don't really believe that.  I think the components that are most
>> likely to wear are the mechanical ones: drives and fans.  Those wear out
>> with every spin. 
>>     
>
> < snip >
>
> You must understand that I am quite ancient and my memory goes back to
> the days before transistors were invented. We used 'valves' or 'tubes'
> and these lasted much longer by being left on permanently. Also I
> suspect that the quality of resistors, capacitors etc was no where near
> as good as those used today.
>
> Norman 
>
>
>   

Warmed-up components wear less than cold ones. As for the bearings in 
fans, these are non-contact so don't have any friction or wear.