Thanks for the heads-up on a useful command. I tried it
and before it outputs I get a message:

"WARNING: you should run this program as super-user."

I've been blocked from using various commands because
I wasn't running it via sudo, but this is the first
time I saw a warning. I mean, if it wants me to run it
as a super-user then why not block me? What's the
value of the warning? Not an important question, just
if anyone happens to know...