Unable to keep my Git clean and public at Home

I have my dot files in Github publicly.

This means that I have only a few files at my Home shared with others.

The disadvantage of sharing, for instance, .bashrc with others is that I need to be careful not adding confidential data to Github.

I run

git status

I get a long list of untracked files.

I found out that apparently the only way to get rid of them them is by running

git clean -df

This would remove my private files which I do not want to.

How can you remove my private files from Git's status without removing my private files at my Home?

Solution

You can ask Git to ignore given untracked files using gitignore mechanism:

.gitignore file in current directory
.gitignore file in top directory of your repository
info/exclude file in $GIT_DIR (in .git repository database)
set core.excludesFile config variable to e.g. "/home/user/.gitignore"
(currently Git does not expand environmental variables such as $HOME or '~' in paths)

For your situation it would be probably best to use '.git/info/exclude', because this way name of ignored file would be not visible to others, contrary to the situation where you accidentally commit .gitignore file, or you are forced to have it in repository. Usually .gitignore (versioned and distributed) is about ignoring e.g. generated files, while info/exclude (or code.excludesFile) is about ignoring site-specific files, like backup files of your editor.