Open the file with OpenWith Another great website to tinker with while dealing with cagey files is OpenWith.org. Open With too has a large database and probably knows about the extension you are ...

In this case, none of the above three methods work to open that file. To open the files with no extensions, first, you have to identify their extension or type.

You can identify, run or open any file with an unknown File extension on Windows 11/10 using one of these free software or online tools. 1] TrIDNet File Identifier ...

By installing Attachment Icons for Gmail, you'll be able to quickly identify if it's a PDF, MP3, ZIP, or any other common file type attached to your e-mail without even having to open it ...

The type, which, and compgen commands are probably the most useful, though the compgen command's options take you far beyond the task of exploring builtins and executable command files.