Is it possible to distinguish a file from a hard link to a file? That is, given a filename, can you tell whether it was created using an ln command? Explain.

What will be an ideal response?

You cannot distinguish between hard links to a file because all hard links
are of equal value. Each hard link points to the location of the file on the
disk. The space that the file occupies is released only when the last hard link
is removed.