Git commit opens blank text file, for what?

Question

In all the Git tutorials I\'ve read they say that you can do:

git init
git add .
git commit

When I do that I get a big text file opened up.

Answer 1

You're meant to put the commit message in this text file, then save and quit.

You can change the default text editor that git uses with this command:

git config --global core.editor "nano"

You have to change nano to whatever command would normally open your text editor.