File format of g++ executable

Question

I know that in linux system the extension is quite useless but the g++ executable must have a file format at all. I read about ELF but I'm not sure.

There is a shell command that shows the format of any file?

Thank you!

Answer 1

Yes, the command is called file, here is some documentation about the command: http://linux.about.com/library/cmd/blcmdl1_file.htm

Example of using the file command