Yes, I learned this from a sysadmin in the early 90s and did this when learning to use Unix and having used the technique in various other contexts (e.g. databa

Yes, I learned this from a sysadmin in the early 90s and did this when learning to use Unix and having used the technique in various other contexts (e.g. database DELETEs), I am confident this one weird trick has saved me from catastrophic mistakes countless times.