Here is how to search ~/projects/ dir under #Linux and #Unix for any open files which may have been deleted recursively:
lsof -nP +L1 +D ~/projects/
sudo lsof -nP +L1 +D # the whole system
See https://www.nixcraft.com/t/linux-reports-on-any-open-files-which-have-been-unlinked/4482 for more info.
