"nvidia-settings" and "nvidia-xconfig" commands not working

Problem
When you issue either of commands "nvidia-settings" or "nvidia-xconfig", they don't work, and a message is returned saying "command not found".

Solution
Instead of issuing the commands "nvidia-settings" and "nvidia-xconfig", issue "/usr/lib/nvidia-current/bin/nvidia-settings" and "/usr/lib/nvidia-current/bin/nvidia-xconfig" respectively, as the former ones may not work.