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Date: Fri, 29 May 2009 12:50:35 +0200 (CEST)
From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
To: perryh@pluto.rain.com
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Cc: freebsd-questions@freebsd.org
Subject: Re: Remotely edit user disk quota
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> Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl> wrote:
>
>> Even 15 seconds of thinking is enough to understand that logging
>> to other user and then su - gives completely no extra security.
>
> I don't buy this, given that root's login name is well known :)

if someone can intercept the passwords you type, then he/she will 
intercept both user password you log in and then su password you type.

He/she actually can gain more if you use su, as you may use the same user 
password somewhere else.