afaik nearly every distribution has support for hardware monitoring, and so lm_sensors built in their kernel, as they try to support as much as possible. So dont worry about how to configure your kernel 
and if you just want to now what temp your dedicated cruncher has, without a monitor and keyboard plugged in the command "sensors" in the shell does its job, it even displays your voltages, for example:
Code:
VCore 1: +1.84 V (min = +1.79 V, max = +1.85 V)
+3.3V: +3.39 V (min = +3.14 V, max = +3.47 V)
+5V: +4.84 V (min = +4.76 V, max = +5.24 V)
+12V: +11.80 V (min = +10.82 V, max = +13.19 V)
-12V (reserved): -12.26 V (min = -0.00 V, max = -0.00 V)
-5V (reserved): -5.17 V (min = -0.00 V, max = -0.00 V)
CPU Fan: 5443 RPM (min = 1997 RPM, div = 4)
CPU Temp: +62 C (high = +45 C, hyst = +40 C)
Just take care if the names for the sensors are right 
If someone likes KDE better and wants such a nice temp monitor tool too, i can recommend ksensors - http://ksensors.sourceforge.net/ to see some screens.
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