Redshift adjusts the color temperature of your screen according to your surroundings.
A typical redshift command that I use is
redshift -O 9999 which sets the screen color temperature at 9999K. Following a polyphasic sleep schedule, I prefer to change my screen color a few times a day.
So here's part of my crontab:
LOW='redshift -O 1000' HIGH='redshift -O 9999' 30 4 * * * $LOW 45 12 * * * $LOW 45 20 * * * $LOW 0 6,15,23 * * * $HIGH
It doesn't do anything. I checked the syslog, it does run, but when I catch the output in a file, the file is empty.
Why does this not work? Are there any alternatives to Redshift I could try?