git ignore specific directories

Question

I wanted to recently upload my dotnetnuke website on git, now my website has gigs of images which i don't want to upload over git.

I was searching on GIT and came across .gitignore file which gets created during repository creation, GIT has a documentation about ignorning files/folders and it's specific sub-folder, however it does not seems to work in my case.

Here's my folder structure:

*******Updated*******

.gitignore
public_html/Portals/_default/
public_html/Portals/0/
public_html/Portals/1/
public_html/Portals/110/

Now i want to ignore all folders under Portals except Portals/_default. I tried based on the specification from GIT:

Example to exclude everything except a specific directory foo/bar (note the /* - without the slash, the wildcard would also exclude everything within foo/bar):

    $ cat .gitignore
    # exclude everything except directory foo/bar
    /*
    !/foo
    /foo/*
    !/foo/bar

Below is what i tried:

!/Portals
/Portals/*
!/Portals/_default

But this does not seems to work at all.

Can anyone get me in right direction.

Answer 1

From the git documentation for gitignore:

Example to exclude everything except a specific directory foo/bar (note the /* - without the slash, the wildcard would also exclude everything within foo/bar):

$ cat .gitignore
# exclude everything except directory foo/bar
/*
!/foo
/foo/*

Tada!