Working around redshift's "Provider does not have a valid location available." error

I recently tried redshift, a program to adjust the screen temperature (the proportion of red and blues) according to the hour of the day.

However, I was bitten by a small bug on the old version of Ubuntu I was using : Redshift would fail to start and complain that it couldn’t find my location.

Thankfully, it’s possible to pass redshift the latitude and longitude directly :

   redshift -l 33:-96 

You can find your latitude and longitude using google maps, or this tool.