fancontrol

What is fancontrol?

fancontrol is a command-line tool originally part of the lm-sensors package, designed to automate fan speed control using temperature input. It has been used in Linux systems for over a decade and relies on kernel-level hardware monitoring drivers. While functional, it requires manual configuration and is best suited for experienced users comfortable with terminal and system files.

This tool is for Linux users who want fine-grained control over cooling behavior without relying on GUI tools. It's ideal for system administrators, enthusiasts, and those running headless or minimal systems where lightweight automation matters more than ease of use. The setup involves editing configuration files and understanding hardware compatibility.

Compared to Windows tools like SpeedFan, fancontrol feels more technical and less forgiving. There’s no real-time drag-to-adjust or wizard-guided setup. Instead, you define temperature thresholds and PWM responses in config files. Once working, it’s reliable—but initial setup can be trial-and-error depending on motherboard support.

Best for: Users who need reliable, automated fan control on supported Linux hardware and are comfortable editing system files.

Key features of fancontrol

• Automatically adjusts fan speed based on sensor readings
• Supports PWM and voltage-controlled fans
• Real-time display of temperature and fan speeds
• Customizable control curves and thresholds
• Saves multiple configurations
• Integrates with lm-sensors for hardware monitoring
• Configurable update intervals and logging

Tips for Windows users

Coming from SpeedFan, expect no direct import of profiles or real-time sliders. fancontrol uses /etc/fancontrol instead of a GUI. You’ll need to run sensors-detect first, then manually define input sensors and output fans. Check your motherboard’s PWM support and ensure modules like coretemp and pwmconfig are loaded. The workflow is more deliberate, less instant.

Recent releases

• 26.01 — January 24, 2026