I've been working with and using Linux far longer than any other platform. Through those years, I've pretty much seen and used it all. Interestingly, my tune has changed on a number of things -- one opinion is about the relative security of Linux. Back in the day, I would have looked you in the face and said squarely, “There's no way anyone is going to hack a Linux server!” My tune now is a bit more somber, sober, and far more realistic. But before I get the chance to sing you that tune, let me set the stage.
Over the last week, I was called to check into why a CentOS server was behaving poorly. The server duty was for web/email. The shenanigans were first spotted when a particular email address on the server in question refused to authenticate. I logged into the cPanel, changed the email's password, and attempted to log into the user's webmail. The second I logged in, the password was automatically changed again.