Re: sudo, not su.

2007-12-19 Thread nick knouf
On Dec 19, 2007, at 1:50 AM, M. Edward (Ed) Borasky wrote:
 Yeah ... sudo is more secure than su. In fact, some systems, for
 example, the Gentoo LiveCD, scrambles the root password. So you  
 have to do

 $ sudo su -

 and then set a password to ssh in as root.

+1

This is the same thing as in OS X.  I've been able to do everything I  
need to from the command-line in OS X using sudo without ever having  
to set the root password.  If there's a way to make this fit in with  
the security model and the concerns on the trac entry, then I'm all  
for it.

nick

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Re: Telling time (was: StopWatch activity)

2007-11-16 Thread nick knouf
On Nov 16, 2007, at 1:57 PM, Yoshiki Ohshima wrote:
   Well, it seems that you are responding to a wrong message.

Not really; if the question is whether or not there is a clock  
application that is standard on the laptop, implicit there is a  
decision as to _what kind_ of clock application.  It's that question  
that I wanted to highlight.

   So, what do you think about the idea of letting kids make their own
 clocks?

I should have made it more explicit in my e-mail that I would  
certainly be in favor of a variety of different clock applications  
that reflect local conditions or are based on the logic or whimsy of  
the user.  The only thing I would caution is that the clock  
construction environment should not privilege one type of  
representation versus another.  Not that I am suggesting that you or  
anyone else is necessarily doing that; again, I raise the point for  
the purposes of making the question salient.

nick
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Re: Telling time (was: StopWatch activity)

2007-11-15 Thread nick knouf
 Bert Freudenberg writes:

  I question the very assumption that continuously telling
  the time is even remotely important on a learning machine
  for kids in elementary school age.

 Dealing with time is a critical life skill that must be learned.
 Having a clock is thus very important.

Whose time?  Hours minutes seconds?  Days since a recent feast?  When  
the sun is at a certain position in the sky?  Since I last saw you on  
the road?  How much do I quantize?  Is quantization of time even a  
concept I am familiar with?

The notion of time is _highly_ contingent on situated cultural  
factors.  Just because in the West we measure things using hours,  
minutes, and seconds, does not mean that the entire world does so.   
In fact, our conception of time is directly related to churches and  
clock towers in the middle ages (see Lewis Mumford on this idea)  
first, and then assembly lines and educational/disciplinary  
institutions (see Foucault) .  The rest of the world has not  
necessarily adopted our way of dividing days into ever smaller  
chunks---perhaps there is no quantization at all!

A clock application, especially given the areas of deployment, is  
_not_ something you rush into with the assumption that you can merely  
write a graphic display of 00:00:00.  One must understand the local  
conditions to know how time is told _on the ground_ and be careful to  
not impose a Western notion of quantization and temporal division  
that might be entirely foreign.

nick knouf
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