Pascal de Bruijn wrote an extensive article about color management on Linux systems, covering basic explanations as well as the description of some tools.
There seems to be a lot of confusion about what color management is, what it is supposed to do, and most particularly how to use it on Linux.
Find the article here:
https://encrypted.pcode.nl/blog/2012/01/29/color-management-on-linux/
This is a companion discussion topic for the original entry at https://www.darktable.org/2012/01/color-management-on-linux/