How to check cpu temperature linux

How can I monitor the CPU temperature under linux?

As others have noted, you need the lm-sensors package. I thought I should mention that in addition to installing the package, you should run the sensors-detect command to identify the kernel modules that need to be loaded.

If you haven’t done this, manually run this once and check if it detects any sensors on board your computer.

$ sudo sensors-detect # sensors-detect revision 5249 (2008-05-11 22:56:25 +0200) This program will help you determine which kernel modules you need to load to use lm_sensors most effectively. It is generally safe and recommended to accept the default answers to all questions, unless you know what you're doing. We can start with probing for (PCI) I2C or SMBus adapters. Do you want to probe now? (YES/no): Probing for PCI bus adapters. Use driver `i2c-i801' for device 0000:00:1f.3: Intel 82801G ICH7 We will now try to load each adapter module in turn. Module `i2c-i801' already loaded. If you have undetectable or unsupported I2C/SMBus adapters, you can have them scanned by manually loading the modules before running this script. We are now going to do the I2C/SMBus adapter probings. Some chips may be double detected; we choose the one with the highest confidence value in that case. If you found that the adapter hung after probing a certain address, you can specify that address to remain unprobed. Next adapter: SMBus I801 adapter at 10c0 (i2c-0) Do you want to scan it? (YES/no/selectively): Client found at address 0x50 Probing for `Analog Devices ADM1033'. No Probing for `Analog Devices ADM1034'. No Probing for `SPD EEPROM'. Yes (confidence 8, not a hardware monitoring chip) Probing for `EDID EEPROM'. No Client found at address 0x52 Probing for `Analog Devices ADM1033'. No Probing for `Analog Devices ADM1034'. No Probing for `SPD EEPROM'. Yes (confidence 8, not a hardware monitoring chip) Probing for `EDID EEPROM'. No Some chips are also accessible through the ISA I/O ports. We have to write to arbitrary I/O ports to probe them. This is usually safe though. Yes, you do have ISA I/O ports even if you do not have any ISA slots! Do you want to scan the ISA I/O ports? (YES/no): Probing for `National Semiconductor LM78' at 0x290. No Probing for `National Semiconductor LM78-J' at 0x290. No Probing for `National Semiconductor LM79' at 0x290. No Probing for `Winbond W83781D' at 0x290. No Probing for `Winbond W83782D' at 0x290. No Probing for `IPMI BMC KCS' at 0xca0. No Probing for `IPMI BMC SMIC' at 0xca8. No Some Super I/O chips may also contain sensors. We have to write to standard I/O ports to probe them. This is usually safe. Do you want to scan for Super I/O sensors? (YES/no): Probing for Super-I/O at 0x2e/0x2f Trying family `National Semiconductor'. No Trying family `SMSC'. Yes Found unknown chip with ID 0x2803 Probing for Super-I/O at 0x4e/0x4f Trying family `National Semiconductor'. No Trying family `SMSC'. No Trying family `VIA/Winbond/Fintek'. No Trying family `ITE'. No Some south bridges, CPUs or memory controllers may also contain embedded sensors. Do you want to scan for them? (YES/no): Silicon Integrated Systems SIS5595. No VIA VT82C686 Integrated Sensors. No VIA VT8231 Integrated Sensors. No AMD K8 thermal sensors. No AMD K10 thermal sensors. No Intel Core family thermal sensor. Success! (driver `coretemp') Intel AMB FB-DIMM thermal sensor. No Now follows a summary of the probes I have just done. Just press ENTER to continue: Driver `coretemp' (should be inserted): Detects correctly: * Chip `Intel Core family thermal sensor' (confidence: 9) I will now generate the commands needed to load the required modules. Just press ENTER to continue: To load everything that is needed, add this to /etc/modules: #----cut here---- # Chip drivers coretemp #----cut here---- Do you want to add these lines automatically? (yes/NO) 

If you’re lucky, your laptop will support an array of sensors. If not, you may still find a basic set of sensors for the CPU:

$ sensors acpitz-virtual-0 Adapter: Virtual device temp1: +40.5°C (crit = +105.0°C) coretemp-isa-0000 Adapter: ISA adapter Core 0: +35.0°C (crit = +100.0°C) coretemp-isa-0001 Adapter: ISA adapter Core 1: +40.0°C (crit = +100.0°C) 

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How to Check CPU Temperature on Linux

Like any electrical component, CPUs generate heat when being used. Some resource-demanding programs cause the CPU to increase the clock speed, which results in higher temperatures. Dust buildup also causes the CPU to overheat.

High temperatures shorten the lifespan of sensitive components, so keeping track of CPU temperatures is crucial. This way, you prevent performance throttling or component damage.

In this tutorial, you will learn how to use different tools and in-built utilities to check CPU temperature on Linux machines.

Check CPU Temperature Using Lm-Sensors

Lm-sensors is a command-line utility for hardware monitoring. Use the tool to check the temperature of the CPU and other components. Follow these steps to install and configure Lm-sensors:

1. Open the terminal and install these packages using a package manager for your distribution. In Ubuntu, use the following command:

sudo apt install hddtemp lm-sensors

Wait for the lm-sensors and hddtemp to finish downloading and installing.

2. Execute the sensors command to see the CPU temperature. The output shows the current temperature readings of all sensors in the machine. The results include the temperature of each core and maximum thresholds.

3. To check SSD and hard drive temperatures, execute the following command:

The output shows the temperature of the selected disk.

4. To see which system components you can monitor, run sudo sensors-detect .

Answer YES to multiple scanning requests until the system scan is complete.

When the scan completes, the output shows the summary.

5. To ensure that system monitoring works, load the needed modules using the following command:

6. To run the sensors command repeatedly and get real-time data in the terminal, execute the following command:

The output refreshes every two seconds and displays the current CPU temperature reading.

Note: To check CPU usage on Linux, read our tutorial on How to check CPU usage.

Check CPU Temperature Using Psensor

Psensor is a GUI app that allows you to monitor the temperature of various system components. This utility also allows you to monitor CPU usage and fan speed.

Psensor includes an applet indicator for Ubuntu, allowing you to display the temperature in the top panel to notify you when the temperatures get too high.

Install Psensor

Before installing Psensor, you need to install and configure Lm-sensors.

1. Run this command to install the necessary packages:

sudo apt install lm-sensors hddtemp

2. Next, scan for sensors in your machine:

Answer YES to any scan requests until the scan is completed.

3. To make sure the packages are installed, execute the sensors command.

4. Update the package repository with sudo apt update .

5. Install Psensor using the following command:

Answer YES and wait for the installation to finish.

Using Psensor

Search for Psensor in the app menu and open the utility. The app displays a graph of the selected values and shows the CPU temperature, CPU and memory usage, free RAM, GPU temperature, and HDD temperature.

To configure Psensor and set which stats you want to see, follow these steps:

1. Click Psensor in the menu bar, followed by Preferences.

2. Check off the boxes for the options you want – whether Psensor launches on system startup, the update interval, graph colors, etc.

3. To show CPU or HDD temperatures in the top panel, go to Sensor Preferences under the Application Indicator. Enable the Display sensor in the label option.

Note: Learn more about monitoring CPU performance by referring to our article on Linux perf, a lightweight command-line utility.

Check Temperature Without Third-Party Utilities

There is a way to use the in-built utilities to check the CPU temperature if you don’t want to use third-party apps.

1. To check the CPU temperature without installing a third-party app, use the following command:

cat /sys/class/thermal/thermal_zone*/temp

The output shows the CPU temperature in the five-digit format. Here, 49000 means 49C.

2. If you get several thermal zones and different temperatures, execute the following command to see what a single thermal zone represents:

For example, run cat /sys/class/thermal/thermal_zone2/type to see the type of thermal zone 2.

The CPU temperature is in the zone labeled x86_pkg_temp.

3. To see what all the thermal zones are referring to, use:

The output shows the last stored temperature for that thermal zone in degrees Celsius. In this example, there is only one thermal zone, labeled x86_pkg_temp, which represents the CPU temperature.

You now know how to check CPU temperature on Linux using various utilities. The guide also showed how to configure the tools to display other information, such as GPU and HDD temperature.

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How To Check CPU Temperature in Ubuntu Linux

Overheating of laptops is a common issue one faces these days. Monitoring hardware temperature may help you diagnose why your laptop is getting overheated. In this article, we’ll learn how to check the CPU temperature on Ubuntu.

Check CPU temperature in Linux command line

You can check the CPU temperature using a command line utility called sensors. Combine it with the watch command to keep on monitoring the CPU temperature in the terminal like this:

If your distribution doesn’t have sensors command installed already, you can use your distributions’ package manager to install either sensors or lm-sensors package.

You can see the CPU temperatures refreshed for each core every two seconds:

Every 2,0s: sensors iwlwifi-virtual-0 Adapter: Virtual device temp1: +39.0°C acpitz-virtual-0 Adapter: Virtual device temp1: +27.8°C (crit = +119.0°C) temp2: +29.8°C (crit = +119.0°C) coretemp-isa-0000 Adapter: ISA adapter Package id 0: +37.0°C (high = +82.0°C, crit = +100.0°C) Core 0: +35.0°C (high = +82.0°C, crit = +100.0°C) Core 1: +35.0°C (high = +82.0°C, crit = +100.0°C) Core 2: +33.0°C (high = +82.0°C, crit = +100.0°C) Core 3: +36.0°C (high = +82.0°C, crit = +100.0°C) Core 4: +37.0°C (high = +82.0°C, crit = +100.0°C) Core 5: +35.0°C (high = +82.0°C, crit = +100.0°C)

That was easy, wasn’t it? Let’s see how to do it graphically.

Check CPU temparature with Psensor GUI tool

We’re going to use a GUI tool, Psensor, that allows you to monitor hardware temperature on Linux. With Psensor you can:

• monitor the temperature of the motherboard and CPU sensors
• monitor the temperature of the NVidia GPUs
• monitor the temperature of the hard disk drives
• monitor the rotation speed of the fans
• monitor CPU usage

The latest version of Psensor also provides an applet indicator for Ubuntu and thus it makes the monitoring of hardware temperature even easier on Ubuntu. You can choose to display the temperature right in the top panel itself. It can even send a desktop notification when the temperature exceeds the limit.

Install Psensor on Ubuntu 18.04 and 16.04

Before you install Psensor, you need to install and configure lm-sensors, a command-line utility for hardware monitoring. If you want to measure hard disk temperature, you need to install hddtemp as well. To install these tools, run the following command in a terminal:

sudo apt install lm-sensors hddtemp

Then start the detection of your hardware sensors:

To make sure that it works, run the command below:

It will give you an output like:

acpitz-virtual-0
Adapter: Virtual device
temp1: +43.0°C (crit = +98.0°C)
coretemp-isa-0000
Adapter: ISA adapter
Physical id 0: +44.0°C (high = +100.0°C, crit = +100.0°C)
Core 0: +41.0°C (high = +100.0°C, crit = +100.0°C)
Core 1: +40.0°C (high = +100.0°C, crit = +100.0°C)

If everything seems alright, proceed with the installation of Psensor by using the command below:

Once installed, run the application by looking for it in the Unity Dash. On the first run, you should configure which stats you want to collect with Psensor.

Display temperature in the panel

If you want to show the temperature in the top panel, go to Sensor Preferences:

Then under the Application Indicator menu, select the component for which you want to display the temperature and then check the Display sensor in the label option.

Start Psensor at each startup

Go to Preferences->Startup and then check Launch on session startup to start Psensor at each boot.

That’s it. Everything you need for monitoring and checking your CPU temperature is here. You can keep an eye on it and it may help you find out which process is overheating your computer.

However, do note that it’s often the hardware that causes overheating. If you use a desktop computer, you should regularly clean it. You can refer to this article about reducing CPU temperature.

I hope you find this article useful. Please take a moment to share the article on social media, Hacker News and other such websites. Thank you.

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