Le jeudi 23 août 2012 à 20:24 +0800, lina a écrit :
> 
> Sorry, here you mean,
> 
> once tar -Jcf a.tar.xz a
> 
> again
>       tar -Jcf a.tar.xz a.tar.xz
> ?
No, I think this was a joke :)

In most programs, there is a "depth" or "pass number" parameter that
does just this already. If you try to compress again, the overhead
induced by the container (headers and such) will ultimately increase the
file size. 

Oh, BTW, if you don't need file permissions, just use 7zip directly on
the directories you want to compress: you will avoid tar format
overhead.


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