Software that reduces blue light from monitor
I used f.lux on Windows, it is available for linux too, but it is not opensource so you won't find it in repository.
Redshift is opensource and you should be able to find it in repos.
There are others, but I didn't try them - G.lux, iris mini.
You may achieve this without installing any extra application if you're using GNOME. Newer versions (> 3.24) of GNOME come with a feature called Night Light to be found under Settings > Displays.
I have searched for the same and tried,
- iris mini - Works well but its not free and need to buy license to change any settings. Not available in default repositories
- f.lux - Just flickers sometimes and then goes back to normal color temperature after a while or may be I felt so. Didn't see too much of a difference. Not available in default repositories
- Redshift - It's the easiest to configure of all and I can notice a good difference in terms of color temperature and strain on eyes.
Was able to install with just
sudo apt-get install redshift redshift-gtk
Buy the way, I tried all the above on Ubuntu 16.04 LTS