2. Unzip the folder and copy the xflux file into documents folder.
3. go to the directory where xflux is located. Open terminal and type the following command:
sudo cp xflux /usr/bin/
sudo chmod 755 /usr/bin/xflux
xflux -z 88001 (here 88001 is the zip code for Las Cruces, NM)4. You'll get the following message:
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Welcome to xflux (f.lux for X)
This will only work if you're running X on console.