As one business owner showed, things can go spectacularly wrong when you don't backup properly. User "bleemboy," who runs a site-hosting business with 1,535 customers (!), wrote to a server forum saying he was using a bash script command to erase some specific files. The command he used, "rm -rf" is infamous in Linux circles for causing disasters, thanks to the "f" part that forces it to proceed without warnings. Normally, his script only deletes specific files, but something went wrong and "all servers got deleted and the offsite backups too," since they were mounted to the same machine.