One of my first tasks after being given root access at my first n?x job at an ISP was "clear off all of the DNS stuff on $main_server since we have $dedicated_d

One of my first tasks after being given root access at my first n?x job at an ISP was "clear off all of the DNS stuff on $main_server since we have $dedicated_dns_server now". So I merrily started mv-ing things to a scratch directory that we could wipe in 6 months if we didn't need anything from it. Unfortunately, the zone file directory was NFS mounted from* $dedicated_dns_server. With pass root set. I think I took all of A through to K of client zones offline before we noticed. I'm just very very glad I decided to do it as an mv rather than an rm, since it meant all I needed to do was copy things back. Not that I really learned my lesson that time; it took a couple more semi-disasters before I got sufficiently paranoid to be reasonably safe as root.