Title: Port of the week: sct

	Title: Port of the week: sct
	Author: Solène
	Date: 07 February 2019
	Tags: unix openbsd
	Description:

	Long time I didn't write a "port of the week".

	This week, I am happy to present you sct, a very small utility
	software to
	set the color of your screen. You can install it on OpenBSD with
	`pkg_add
	sct` and its usage is really simple, just run `sct $temp` where $temp
	is the
	temperature you want to get on your screen.

	The default temperature is 6500, if you lower this value, the screen
	will
	change toward red, meaning your screen will appear less blue and this
	may be
	more comfortable for some people. The temperature you want to use
	depend from
	the screen and from your feeling, I have one screen which is correct at
	5900
	but another old screen which turn too much red below 6200!

	You can add `sct 5900` to your .xsession file to start it when you
	start your
	X11 session.

	There is an alternative to sct whose name is redshift, it is more
	complicated
	as you need to tell it your location with latitude and longitude and,
	as a
	daemon, it will correct continuously your screen temperature depending
	on the
	time. This is possible because when you know your location on earth and
	the
	time, you can compute the sunrise time and dawn time. sct is not a
	daemon,
	you run it once and does not change the temperature until you call it
	again.