`rm -rf` vs `rm -ri` could have that sort of impact. Or `sleep 1; shutdown -r now` vs `sleep 1h; shutdown -r now` to reboot the production server. I once delet

`rm -rf` vs `rm -ri` could have that sort of impact. Or `sleep 1; shutdown -r now` vs `sleep 1h; shutdown -r now` to reboot the production server. I once deleted all my source code instead of backing it up to my floppy by doing "del ." while command.com was in wrong drive. (Should have done "del a:\."; two letters cost me a night of running an undelete program)