f.lux: software to make your life better

Official Website

https://justgetflux.com/

Install with ppa

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sudo add-apt-repository ppa:kilian/f.lux
sudo apt-get update
sudo apt-get install fluxgui

Replace core

If your f.lux does not work, please download core from official website.
32 bit
64 bit

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sudo cp -i ${your-xflux-localtion} /usr/bin/

Choose Latitude and Longitude

You can click Find you latitude annd longitude to select your location, and f.lux will automaticly adjust color temperature.