There are odd times where we would have accidentally deleted some important folders without having any actual backup. It happened to us, one of our team members on the way to remove a symbolic link, accidentally deleted a web folder using rm -rf, though we normally maintain GIT repo, for this temporary project, we did not. So we had to restore it though initially, it looked gloomy. I stumbled upon "extundelete" but that could not restore any important files. Then we tried https://www.cgsecurity.org/wiki/TestDisk.