Inside a folder on Windows can be seen its content from Nautilus as shown in the image:

View of Folder from Nautilus

Its contents as seen from terminal:

View of Folder from Terminal

On whatever folder can be found other folders with the name . and .. only from terminal. What kind of folders are these? Is it something to worry about? I can't see inside of these folders neither from Terminal nor from Nautilus.


No need to worry. This is system names related to current folder and parent folder.
. - current
.. - parent
Its used to go to parent directory: cd .. Current used to make relative path as example ./somescript.sh (since current folder not in PATH)

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