GNU/Linux Pop_OS! Installing Redshift – Quick-Start Guide
You Are Welcome! The Tutorial Shows You Step-by-Step How-to Install Redshift in Pop_OS! LTS GNU/Linux.
And Redshift for Pop_OS! adjusts the Color Temperature according to the position of the Sun.
So as a Blue Light Filter a different Color Temperature is set during Night and Daytime.
Moreover, during twilight and early Morning, the Color Temperature transitions smoothly from Night to daytime temperature to allow your Eyes to slowly adapt. At Night the Color Temperature should be set to match the Lamps in your Room.
Especially relevant: on GNOME instead you may simply make use of the Night Light Settings Applet!
1. Terminal QuickStart
How-to Quick-Start with Command Line on Pop_OS!Command Line Pop_OS! QuickStart Guide
First Update the Apt Repo Sources with:
sudo apt update