What does the . (dot) indicate at the beginning of the file name? How

1.	What does the . (dot) indicate at the beginning of the file name? How can it be listed?
Answer» If the file name begins with ".", it is a hidden file. When a dot appears at the beginning of a filename, the file is hidden in most file managers and shell PROGRAMS. A Shell usually lists all the files except hidden files when you try to list the files in a shell. Despite this, hidden files can be found in the DIRECTORY. The Is COMMAND must be run with the "–a" FLAG if you wish to SEE hidden files.

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