Hi, I don't understand the answer here:
unix.stackexchange.com/a/93775/15760. The question seemed to say that
sort foobar > whatever
and
sort -o whatever
are equivalent. But the answer says that "You can't go to the same file with redirection, the output redirection wipes the file." What does that mean and how does it relate to the question? OP has accepted the answer and it has three upvotes and it makes sense to others.