sensorz — Temperature and Fan Monitor

sensorz shows how hot your machine is and whether its fans are still spinning.

One box per class of sensor - CPU, GPU, drives, and the motherboard
thermistors - each with one large figure, its history as a graph, and the
thresholds it is judged against. Where a machine reports many of a thing, the
readings are averaged rather than listed: sixteen cores and eight case fans
are four numbers, not twenty-four.

It reads the kernel's hardware monitoring interface directly, so it works with
whatever drivers the machine already has, and it reports temperatures and fan
speeds and nothing else.