Change mouse cursor theme in Ubuntu

There are a few applications that should allow changing default mouse cursor in Ubuntu. Unity Tweak Tool, GNOME Tweak Tool, Dconf Editor fail to change the mouse cursor or do it in such a way that it uses mixed themes.

In order to have a consistent cursor theme you must select it from one of these apps and also run a command in Terminal. First, the command. This is the most important and you may not even need to change the cursor theme from those apps too.

sudo update-alternatives --config x-cursor-theme