Tagged Questions
2
votes
1answer
92 views
Copying a working Linux instead of installing a new one [duplicate]
It is possible to move an installed Linux from one drive to another or from one disk to another by two methods:
dd command which copies sector by sector including boot sector
cp command, and then ...
3
votes
2answers
125 views
how to create ISO and hide certain files
I am a newbie here and my apologies if I am posting a question which has been answered many times in a another thread.
I did my homework find some relevant information But could not.
Thanks for ...
0
votes
1answer
105 views
Stripping null byte blocks with a sparse file?
I've created a sparse file with dd. How do I copy contents of another file there, leaving all the zero blocks unallocated?
6
votes
1answer
1k views
dd: writing '/dev/null': No space left on device
I am reading a 550MB file into /dev/null and I am getting
dd: writing '/dev/null': No space left on device
I was surprised. I thought /dev/null is a black hole where you can send as much as you ...
3
votes
3answers
238 views
from a sparse file to a block device over the network
If I have a sparse file representing a block device, then how can I efficiently restore the file over a network? Ideally, I'd use rsync -S host:file /dev/sdb, but rsync won't write to block devices. ...
4
votes
1answer
500 views
How do I create a USB image with a partition table?
I want to create an image of some directory tree that is writable directly to an USB drive, just like the images of many linux distributions. For example, with openSUSE you can download an ISO image ...
4
votes
2answers
2k views
gzip - redirection or piping?
I will be backing up a large (750GB) disk to an external USB disk using dd.
Should I be using redirection or piping? Which is more efficient? Or is there a difference?
Also, what is the best block ...
0
votes
2answers
916 views
How to write a file at various offsets to a filesystem partition with dd command
Requirement
I want to write a file at various offsets into the partition
Partition /dev/part2 is mounted at /mypart
I tried the command below:
dd if=/dev/urandom of=/mypart/aaa bs=1024 seek=0 ...
0
votes
2answers
168 views
What happened to my ext3 partition
I had an ext3 partition. I ran a dd command like this:
dd if=/dev/urandom of=/dev/part2 bs=1024 count=15000 seek="various values"
Where various values are basically 0, 15000K, 30000K etc.
The ...
13
votes
3answers
2k views
Why does dd from /dev/random give different file sizes?
I am running the following command on an ubuntu system:
dd if=/dev/random of=rand bs=1K count=2
However, every time I run it, I end up with a file of a different size. Why is this? How can I ...
1
vote
2answers
245 views
Embedded device: How to do raw reads and write to flash (emmc/movinand) bypassing file system cache
I have an embedded device with a flash memory running linux.
I want to do raw read writes on the flash part but I also want to avoid any file system cache. How can I do this? Any pointers?
3
votes
3answers
260 views
Some basic questions about dd
I'm working on a system of how to back up partitions using dd and have been reading a lot about it. I have a few questions and assumptions that I would like to ask.
These may seem a little noob-ish, ...
5
votes
2answers
701 views
Red Hat cannot boot after clone with dd
I used dd to clone a x4100 server with Linux Red Hat. The hardware is identical for old and new servers. Disks are sda, sdb and sdc(sdc1 and sdc2). But newly restored server gives following errors and ...
4
votes
3answers
2k views
How can I make a bootable usb flashdrive?
Can I just dd an Ubuntu 11.04 mini.iso to an usb flashdrive an boot from it? or what am I missing?
