Why don't exclusions work in gitignore?

Question

git

For a Bitrix project, I set up ignoring the bitirx folder. But there are a few files in the admin subfolder that need to be monitored.
those.
bitrix - ignore
bitrix/admin - ignore
But bitrix/admin/filename.php should be tracked
In gitignore I set:

bitrix/*
!bitrix/admin/
bitrix/admin/*
!bitrix/admin/filename.php

There is no file in git status output. Those. it is not tracked. What am I writing wrong?

Answer 1

/bitrix/*
!/bitrix/admin/
/bitrix/admin/*
!/bitrix/admin/filename.php

Answer 2

You can not add exceptions to .gitignore, but simply add these files manually via
git add
and commit. They will be subsequently tracked despite the fact that the entire folder is in .gitignore

Answer 3

even if the folder is ignored, you can say
git add /file.txt
and it will be added to git.