Hacker Read

ryao · 2017-01-09 01:35:16+00:00

Then I would not have been able to demonstrate how to use the gzip command with dd.

vermaden | karma 3209 | avg karma 4.27 · | 2017-01-08 23:11:02+00:00

> How do you combine dd with gzip?

# dd < /dev/ada0 bs=8m | gzip -c -9 > /mnt/file.raw.gz

> How do you use pv if the source is raw device?

# dd < /dev/ada0 bs=8m | pv | dd > /dev/ada1 bs=8m

> How do you dd over ssh?

# dd < /dev/ada0 bs=8m | gzip -9 | pv | ssh user@host 'dd > /dev/da1 bs=8m'

> This belief can make simple tasks complicated.

As master Dennis Ritchie once said - "UNIX is very simple, it just needs a genius to understand its simplicity."

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mrfusion | karma 16153 | avg karma 2.36 · | 2015-03-08 04:30:09+00:00

I'm confused about the challenge. Why wouldn't simply using gzip work? I must be missing something obvious.

blattimwind | karma 8132 | avg karma 3.26 · | 2020-03-10 17:39:33+00:00

gzip is very slow. I don't know why anyone would still use it today.

fwip | karma 2627 | avg karma 1.64 · | 2022-10-10 23:29:14

Next time try gzip -1, it's much faster.

dvh | karma 5252 | avg karma 3.33 · | 2015-03-27 14:57:37+00:00

Why no comparsion with common contestants: gzip, bzip, dd?

joshu | karma 14055 | avg karma 3.32 · | 2009-05-12 02:04:48+00:00

IIRC gzip doesn't make sense under 500 bytes

amelius | karma 42902 | avg karma 1.63 · | 2015-12-12 13:27:41

If you'd included the "zip" format in your analysis, gzip would not be the best at something anymore.

Puts | karma 1162 | avg karma 4.54 · | 2022-11-11 01:56:25

I get the impression the author missed out on zcat for reading gzipped files.

yunohn | karma 3181 | avg karma 1.55 · | 2023-06-29 10:46:26

You can definitely be in situations where you have python but not gzip.

peteretep | karma 19492 | avg karma 3.65 · | 2016-04-20 10:42:09+00:00

My complaint is that I can't upload a gzip'd file and have it decompressed on their end, yes.

Yes, the other things I could have meant would have been odd, so I'm not sure why you spent time typing them out.

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tambourine_man | karma 37043 | avg karma 6.16 · | 2013-10-18 14:11:30+00:00

This probably won't work if you have gzip on, right?

mixmastamyk | karma 12554 | avg karma 1.22 · | 2011-12-16 19:49:02+00:00

gzip will negate a great deal of that advantage.

quesera | karma 6030 | avg karma 2.56 · | 2023-06-14 09:50:11

gzip?

physcab | karma 5125 | avg karma 4.51 · | 2009-09-22 02:36:49+00:00

Gzip?

zamalek | karma 12746 | avg karma 2.86 · | 2022-10-19 18:27:27

Could be done with a gzip bomb.

xmprt | karma 3764 | avg karma 3.07 · | 2021-03-15 00:29:18+00:00

I might be overexplaining but it's a joke because lossy compression of a gzip would end up with you losing data that could render the entire file unreadable.

TazeTSchnitzel | karma 26116 | avg karma 2.81 · | 2012-10-05 09:34:06+00:00

Gzip could certainly be abused.

jandrese | karma 30121 | avg karma 3.36 · | 2022-10-10 21:03:05

Not without changing the structure of the gzip unfortunately.

DamonHD | karma 2383 | avg karma 1.69 · | 2017-04-24 12:18:45+00:00

Always direct.

Today is the first time I've seen gzip actually happen though! If only all my other problems were so easily solved by whining!

But still: sending, compressing, uncompressing stuff that definitely adds no value and would be trivial to statically omit almost all of is still a downside...

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