Ubuntu How to run the program?

Question

linux

I’m sitting through ssh, that is, how to run it from the terminal, there is a file without a format but executable for Linux, sort of like,
I write by the name of the file, it writes
"File name": command not found
You also need to write a selection when you are in the folder with the file ./"file name" it says
-bash: ./"File name": Permission denied

Tell me what to do by the way, this game server program can tell you
something.

Answer 1

chmod +x samp03svr
./samp03svr

and do not sit under the root.

Answer 2

bash: ./"Filename": Permission denied

Not enough rights. Try:
sudo ./filename