[CentOS] find /etc -size -1G return only empty files

Mike McCarty Mike.McCarty at sbcglobal.net
Thu Mar 25 09:41:37 UTC 2010

Nicolas Thierry-Mieg wrote:
> Nicolas Thierry-Mieg wrote:
>> Ala1n Sp1neu8 wrote:
>>> Hello
>>> find /etc -size -1G
>>> should return all files less than 1Giga byte in /etc, but return a
>>> list of empty file (size=0)
>>> find /etc -size -2G
>>> work fine and return all the files
>>> This works the same  on my fedora11 and my centos 5 !
>>> Did I miss something or is it a bug ?
>> not sure, but:
>> -1  strictly less than one, being an int that has got to be zero.
>> G   unit is GB.
> I'm sure now, a simple test confirms this.
> +n : >=n, so behaves as expected
> -n : <n, n being an int, so that's <=n-1 which can make a big difference 
> when you have a G behind that n.

Interesting. The man page is somewhat ambiguous on this point, but
does hint at that when it mentions that it references a number of
units, the unit being changeable, and defaults to 512 bytes.

So, then,

	-size -1024M

should do what he wants, up to within 1MB blocks, but still
doesn't reference bytes. To do it exactly by the byte, one would
	-size -1073741824b

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