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4 reasons PowerTop is the most powerful Linux tool you're not using
Quoting: PowerTOP is a free Intel tool for making Linux more power-efficient —
PowerTOP is a Linux tool created by Intel to monitor and diagnose power usage by running apps and services. It's best used for devices with internal batteries, and you need a way to work out what's draining your internal power source between charges, or those that run continuously, and efficiency is a priority. It's interesting in that the tool lets you manipulate power management settings to experiment with different configurations. Released in 2007, the tool has since been updated to work with modern hardware.