Redshift

Redshift is Article description::an automatic color temperature adjustment to help reduce monitor eye strain induced by working in low-light conditions. Depending on the location (longitude and latitude) of the user's computer system, Redshift will change the color of the screen from the default bluish color to a orange/reddish color during evening hours, and then back again to bluish tint during daylight hours.

Emerge
After setting necessary USE flags, install Redshift:

Files
A configuration file can be created in each users home directory at

In order for Redshift to start, it will require longitude and latitude information inside the configuration file.

Saving lon/lat
Redshift can be quickly established in working order by adding correct location information into the configuration file. Lat/Lon values can be found searching for the closest city or region at Wikipedia or with a map service such as OpenStreetMap.

When using OpenStreetMap, simply search for the location. When it appears on the map tiles click the button (should be near the top left). The center of the displayed tiles will be the exact Lat/Lon location. The Lat value is the second number from the end displayed in the URL. The Lon value is the last number on the end.

A finished file will look something like this:

OpenRC
Redshift does not currently include an OpenRC init script.

Troubleshooting
If you are not using a Display manager, you may encounter a similar error in the output of  To verify this, simply issue   in a terminal. If redshift starts up correctly, then this is likely the issue.

There are several solutions to this problem:


 * 1) Install and use a Display manager
 * 2) Start your window manager with
 * 3) Add   to your   file. (Note: this is not the idiomatic way to approach this when using systemd as it bypasses the service altogether)