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Show CPU and hardware temperatures

harmlessSystem and hardwaredebian, ubuntu
user@server
sensors

Shows all detected sensors, typically the CPU core temperatures (coretemp or k10temp), plus fans and voltages depending on the mainboard. The high and crit thresholds appear next to each reading. Useful with throttling, unexplained crashes or fan problems.

Note: Package: apt install lm-sensors, after which sensors-detect finds additional sensor chips. Virtual servers have no sensors.

Also searched as

  • show cpu temperature linux
  • is the server overheating
  • read fan speed

Related one-liners

All in System and hardware

Show CPU model, cores and threads

$LC_ALL=C lscpu | grep -E '^\s*(Model name|CPU\(s\)|Thread\(s\) per core|Core\(s\) per socket|Socket\(s\)|Virtualization|Hypervisor vendor|L3)'
harmlessSystem and hardware

Show hardware errors and warnings in the kernel log

#dmesg -T --level=err,warn
harmlessSystem and hardware

Show installed RAM modules and free slots

#dmidecode -t memory | grep -E '^\s+(Size|Type|Speed|Locator|Manufacturer|Part Number):'
harmlessSystem and hardware

Show network, RAID and storage controllers with driver

$lspci -k | grep -A3 -iE 'ethernet|raid|sata|sas|nvme|non-volatile'
harmlessSystem and hardware

Show server manufacturer, model and serial number

#dmidecode -s system-manufacturer && dmidecode -s system-product-name && dmidecode -s system-serial-number
harmlessSystem and hardware

Change swappiness at runtime

#sysctl vm.swappiness=10
cautionSystem and hardware

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