I saw the man page of test.
where the below is mentioned.
-e pathname
True if pathname resolves to a file that exists. False if pathname cannot be resolved.
-f pathname
True if pathname resolves to a file that exists and is a regular file. False if pathname cannot be resolved, or if pathname resolves to a file that exists but is not a regular file.
the -f flag says
True if pathname resolves to a file that exists and is a regular file
Could anybody please tell what is a regular file and what is not a regular file.