Last updated on October 7, 2020 by Dan Nanni
In most cases, you are not supposed to be worried about the temperature of your computer. Barring manufacturing defects, hardware is designed so that its temperature does not exceed maximum operating temperature. But even without any hardware fault, overheating can occur due to various software issues, e.g., buggy graphics card driver, misconfigured fan control program, malfunctioning CPU frequency scaling daemon, etc. As pointed out by Ben in the comment, another quite common cause for overheating is dust, dirt and debris clogging the cooling system (fan, heat sink and ventilation openings). I can imagine this could happen quite often with older hardware.
Overheating may become serious enough to cause permanent damage on your hardware. So watch out for any overheating issue in your system. Even better, have temperature monitoring system in place, so that you will be alerted if system temperature suddenly goes up.
In this tutorial, I describe how to monitor system temperature on Linux.
There are several user space tools on Linux, which allow you to check and monitor temperature of various system components.
lm-sensors is a software tool that draws from hardware embedded sensors to monitor temperatures, voltage, humidity and fans.
hddtemp is a tool that can measure the temperature of hard drives from S.M.A.R.T. readings.
psensor is a graphical front-end for temperature monitoring, which visualizes temperature readings from CPUs, NVidia/ATI/AMD GPUs, hard disks, etc.
In the following, I will describe how to set up
psensor to monitor the temperature of CPUs and hard drives.
psensor can visualize system temperature based on the information obtained from other tools such as
hddtemp. Thus you need to install
psensor along with those prerequisites.
psensor on Ubuntu or Debian:
$ sudo apt-get install lm-sensors hddtemp psensor
Another way to install
psensor on Ubuntu is to use their PPA repository which contains a more recent version of
$ sudo add-apt-repository ppa:jfi/ppa $ sudo apt-get update $ sudo apt-get install lm-sensors hddtemp psensor
psensor on Fedora:
$ sudo yum install lm_sensors hddtemp $ sudo yum install gcc gtk3-devel GConf2-devel lm_sensors-devel cppcheck libatasmart-devel libcurl-devel json-c-devel libmicrohttpd-devel help2man libnotify-devel libgtop2-devel make $ wget http://wpitchoune.net/psensor/files/psensor-0.8.0.3.tar.gz $ tar xvfvz psensor-0.8.0.3.tar.gz $ cd psensor-0.8.0.3 $ ./configure $ make $ sudo make install
Due to the requirement for GTK3 libraries,
psensor is not compatible with the GNOME 2 desktop of CentOS or RHEL 6.
psensor, you need to configure
lm_sensors, run the following command. Choose
YES to every question.
$ sudo sensors-detect
This command will probe for and detect embedded sensors in your hardware (including CPUs, memory controllers, I/O chips), and automatically determine which driver modules need to be loaded to check temperature on your system.
Once sensor probing is completed, you will be asked to add detected driver module(s) to
/etc configuration, so they can be loaded automatically upon boot.
On Ubuntu or Debian, detected driver modules will be added to
/etc/modules. On Fedora, the driver information will be added to
Next, proceed to load necessary modules as follows.
$ sudo service module-init-tools start
$ sudo /etc/init.d/kmod start
$ sudo service lm_sensors start
You also need to launch
hddtemp which monitors the temperature of hard drives.
Run the following command to launch
hddtemp as a daemon. Replace
/dev/sda with the disk drive to monitor on your system.
$ sudo hddtemp -d /dev/sda
To start monitoring temperature with
psensor, simply run:
psensor window shows a list of available sensors, and visualizes temperature readings from these sensors. You can selectively enable or disable each sensor.
Optionally, you can set an alarm level for each sensor, so that you can be notified when the temperature from a sensor exceeds a threshold.
The default temperature unit used by
psensor is Celsius. A recent version (
psensor can convert temperature unit between Celsius and Fahrenheit. If the version of
psensor you are using is outdated (e.g.,
0.6.x), and does not have unit conversion, install
psensor from its PPA repository (for Ubuntu users) or build it from its source (for Debian users).
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