Re: Some help with dd backing up into an iso
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
On Tue, Mar 07, 2017 at 10:55:01AM +0200, Teemu Likonen wrote:
> tomas@tuxteam.de [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
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.12 (GNU/Linux)
iEYEARECAAYFAli+doIACgkQBcgs9XrR2kZsVwCeONbK4j0nQ8NSfjsuR35nDfdt
GPQAniS6O9XP51LjWgAo3lggqBK40T1r
=DxLy
-----END PGP SIGNATURE-----
Reply to: