RHEL 7.x How to Reduce Eye Fatigue & Strain
Hello Red Hat Linux User! This tutorial will guide you step-by-step on How to Install f.lux GUI Applet and Reduce Eyes Fatigue, Strain and Insomnia Problems on Red Hat Enterprise 7.x GNU/Linux Computers.
f.lux is a Proprietary Computer Program that Adjusts a Display’s Color Temperature according to Location and Time of Day.
The f.lux Program was Designed to Reduce Eye Strain during Night-time use and Disruption of Sleep Patterns.

Open a Shell Terminal emulator window
In case first see: Terminal QuickStart Guide.
Download f.lux GUI Source Code
Extract fluxgui Source into /tmp
Simply Double-Clicking/Right-Clicking on Archive..Install Python 2/3 PIP for Red Hat GNU/Linux
Install Required Packages.
sudo pip install pexpect
sudo yum install pyxdg gnome-python2-gconf pygtk2-libglade python-appindicator
If Got “User is Not in Sudoers file” then see: How to Enable sudo
Installing f.lux GUI.
cd /tmp/xflux-gui
sudo python ./setup.py install
Run f.lux GUI & Make Initial Set-Up.
fluxgui
Or:
sudo fluxgui
Click on Link on Applet to Find your Location Lat. & Long.!
You dispose of several Color Warmth configurations…