>Unfortunately, it is harder to configure than F.lux. It is a command line only tool (with a GUI indicator component) and it requires creating a manual configur

>Unfortunately, it is harder to configure than F.lux. It is a command line only tool (with a GUI indicator component) and it requires creating a manual configuration file. I've been using Redshift for years, and it didn't require creating a manual configuration file unless you wanted to override the default settings. By default, it would use the geoclue2 package to try to figure out your geolocation and automatically adjust the brightness depending on that. Unfortunately, the geoclue2 package has been broken on Fedora for several releases (it triggers an SELinux alert), so I only recently had to create the redshift conf file to manually specify my GPS coordinates. Other than that, there's no need to override any of the other default settings.