In your home directory, located
/home/<username>, or simply
~, you will find
~/.config. Directories prefixed with
. are hidden by default
so you will need to view it using
ls -la (
-a is the all flag).
In this directory lives all the configuration of installed applications. For example
neovim configuration will be in
If you are using a TWM, you usually put you configuration in here.
These are usually called dotfiles.