I was a Sysadmin for a university for a while. During those years I also messed up once. I learnt one thing: If you run a command that cannot be undone, you pau

I was a Sysadmin for a university for a while. During those years I also messed up once. I learnt one thing: If you run a command that cannot be undone, you pause, take a few seconds and think. Is it the right directory? Is it the right server (yes this has happened to me too). Are those the right parameters? Can I simulate the command beforehand? I introduced this double check for myself, and it has actually caught a few commands I was about to run.