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Re: Some help with dd backing up into an iso




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On Tue, Mar 07, 2017 at 10:55:01AM +0200, Teemu Likonen wrote:
> tomas@xxxxxxxxxx [2017-03-07 09:35:06+01] wrote:
> 
> > dd comes in handy whin you know how much to copy. So this idiom makes
> > sense
> >
> >   dd if=/dev/zero of=lotsofnull bs=1024 count=1024 # copy 1M of zeros
> 
> That particular thing can be made faster without transferring any data:
> 
>     $ dd obs=1M count=0 seek=1 of=file
>     0+0 records in
>     0+0 records out
>     0 bytes (0 B) copied, 1,1289e-05 s, 0,0 kB/s
> 
>     $ ls -lh file
>     -rw-r--r-- 1 dtw dtw 1,0M 2017-03-07 10:52:14 file

Provided you want holes in it.

regards
- -- t
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