Your Name wrote:
On 2017-12-14 03:16:11 +0000, Wolf K said:

That's what Open With is for.

Open With is near useless if you don't know what the file actually is.
You'd have to Open With with every app you have until you found one that
could open it properly.

If you don't have any tools, and are on a desert island,
you use "Open With" "Wordpad" to figure out what something
is. It's not that hard.

*******

In Windows 10, you'd do:

bash
cd /mnt/c/users/freddy/Downloads
file my_unknown_file_download

and it would tell you.

Not everyone installs the optional bash (downloads
from the Store, on command).

*******

On Windows 7, you could get a copy of this.
As you wouldn't have the Bash version to use.

http://gnuwin32.sourceforge.net/packages/file.htm

Paul