Redshift, depending on the time of day, automatically adjusts a video monitor, allowing your eyes is not so much strain.
After installation and activation, color temperature is determined depending on the time of day. Night and day use different color temperature. During the sunset and early morning color temperature smooth transition from the settings for the night to day options, allowing his eyes to adapt gradually, which greatly relieves the strain on the eyesight.
Install Redshift. Do not neglect your vision, if you are long at the computer monitor.
Installation into Linux Mint:
sudo apt install gtk-redshift geoclue-2.0
In order Redshift correctly chosen and regulate the color temperature, it is necessary first of all to find the coordinates of your location. To find the coordinates (latitude and longitude) of your city (district), there are many ways, but the easiest is in a search engine (Google, Yandex, etc) to enter the Coordinates, New York, USA (example) and set the search. When coordinates are found they must be inserted in the following command instead of those that are highlighted in red (it coordinates my country):
gtk-redshift -l 68:33 -t 5500:4500
And then run the same command in terminal to Redshift started to work. After the command is executed, you should see the tray icon indicator lights. Activate Autostartup to Redshift run when you log in.
That's only in the autostartup applications in the field will only appear with a launch command Redshift in the background.
In order for the program to work correctly, you need the Command field to Supplement your team coordinates, or to enter a command, which you first ran the application:
Note. Parameters 5500:4500 - optimal color range, tested by many users:
day - 5500K;
night - 4500K.
Official page of the application: http://jonls.dk/redshift/