Not learned from this incident but in general: - you don't have a backup until you test restore - use checklists and scripts - use another person as

Not learned from this incident but in general: - you don't have a backup until you test restore - use checklists and scripts - use another person as soundboard, esp. to confirm destructive changes or "ad hoc" commands. Show intend. Acknowledge. - every line entered in prod must have been tested in dev, with known result (ideally everythign in prod should be scripted) - use cp or mv with date instead of rm (what changes are "irreversible") - use different prompt/color background in prod terminals - don't work tired