gitignore binary files that have no extension

Question

How can binary files be ignored in git using the .gitignore file?

Example:

$ g++ hello.c -o hello

The

Answer 1

Add something like

*.o

in the .gitignore file and place it at the root of your repo ( or you can place in any sub directory you want - it will apply from that level on ) and check it in.

Edit:

For binaries with no extension, you are better off placing them in bin/ or some other folder. Afterall there is no ignore based on content-type.

You can try

*
!*.*

but that is not foolproof.