bfg-tool

# repo history cleanup
# https://rtyley.github.io/bfg-repo-cleaner/
# https://github.com/IBM/BluePic/wiki/Using-BFG-Repo-Cleaner-tool-to-remove-sensitive-files-from-your-git-repo
download bfg jar file
# https://search.maven.org/classic/remote_content?g=com.madgag&a=bfg&v=LATEST

```bash
 curl  https://repo1.maven.org/maven2/com/madgag/bfg/1.13.0/bfg-1.13.0.jar > bfg.jar
 git clone http://yourrepo
 cd yourrepo
 git pull yourbranch
 git checkout yourbranch
 java -jar ../bfg.jar --delete-files yourfile.txt
 git reflog expire --expire=now --all && git gc --prune=now --aggressive
 git commit -m "my new state"
 git reset --hard <commit>
 git push --force
```
## https://stackoverflow.com/questions/25436312/gitignore-not-working
The files/folder in your version control will not just delete themselves just because you added them to the .gitignore. They are already in the repository and you have to remove them. You can just do that with this:

(Remember to commit everything you've changed before you do this.)

```bash
git rm -rf --cached .
git add .
```