To add to gitignor, you can add the necessary folders and make another commit, will it be possible to remove them from the git?

Question

git

commit files, but forgot to add some of them to ignore

Answer 1

Can't be removed automatically.
Files added to .gitignore will not be automatically committed, but if they already exist in the repository, or you explicitly add any such file, then they will not be deleted by themselves, and their changes will automatically be committed.
Therefore, you need to both add them to .gitignore and explicitly remove them from the repo.

Answer 2

git rm -r --cached .
--cached will tell git what to remove from the index, it will not touch real files
Instead of a dot, you can specify a specific file