Sct (set color temperature) is a UNIX tool which allows you to set the color temperature of your screen. It is simpler than Redshift and f.lux.
Original code was published by Ted Unangst: http:https://www.tedunangst.com/flak/post/sct-set-color-temperature
Minor modifications were made in order to get sct to:
- compile on Ubuntu 14.04
- iterate over all screens of the default display and change the color temperature
- free the Display structure
- fix memleaks
- clean up code
- return EXIT_SUCCESS
Compile the code using the following command:
cc -std=c99 -O2 -I /usr/X11R6/include -o sct sct.c -L /usr/X11R6/lib -lm -lX11 -lXrandr
Execute sct using the following command:
./sct 3700 0.7
The first parameter (3700 above) denotes the color temperature and can be
between 1000 and 10000.
The second one is brightness.
If sct is called without parameters, sct sets the color temperature to 6500.