[clug] Moving the contents of / to a new filesystem on Ubuntu?

[Ben Nizette]

On 27/07/2010, at 9:48 AM, Ben Nizette wrote:

> 
> On 27/07/2010, at 6:58 AM, Craig Small wrote:
> 
>> cd /
>> tar cf - . | ( cd /newdir ; tar xf - )
>> 
>> I've used that a lot, especially when drives didn't used to be that
>> good.  Make the second tar xvf if you want to see what is going on.
>> 
> 
> I used to use that too but I couldn't work out what it does that cp -a or rsync -aHAX don't (in fact I think rsync -aHAX might even do a more complete job of preservation than tar).  Anyone know the differences?

OK of course there's a brazillion differences, rather "anyone know why I'd use the twin-tar version over the others?"

Thx :)
	--Ben.