https://justgetflux.com/linux.html

Flux GUI install instructions for Debian

# Install dependencies
sudo apt-get install git python-appindicator python-xdg python-pexpect python-gconf python-gtk2 python-glade2 libxxf86vm1 -y

# Download and install xflux-gui
cd /tmp
git clone "https://github.com/xflux-gui/xflux-gui.git"
cd xflux-gui
sudo python ./setup.py install

# Run flux
fluxgui

Find Latitude/Longitude of location using https://justgetflux.com/map.html

Linlithgow is 55.9790, -3.5687

Night 3400K

Alternative software:

http://jonls.dk/redshift/