For the most part, you can read the Filesystem Hierarchy Standard to get an idea of what all the different directories do: https://www.pathname.com/fhs/ https:/

For the most part, you can read the Filesystem Hierarchy Standard to get an idea of what all the different directories do: https://www.pathname.com/fhs/ https://www.pathname.com/fhs/ Distros mostly keep to this, but they implement their own details and you should look into each distribution to know exactly what goes on in any particular one.