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.