git commit -a confusion

Question

I am using Git Bash and am trying to figure out what is happening when I type \'git commit -a\'.

Looks like VIM opens up to edit my commit message but how do I save

Answer 1

To save your commit you save and exit the file as you normally would in vim.

:wq

If you change your mind and want to abort you exit without saving.

:q!

You don't have to use VIM though, you can set the editor, for example the following would change the editor git uses to textmate.

git config --global core.editor textmate