find a particular string on an unmounted partition

hexdump -e '8/1 "%02X ""\t"" "' -e '8/1 "%c""\n"' /dev/sda1 | less /mystring

0
By: gerard
2010-12-17 10:28:40

These Might Interest You

  • this work even if a partition table exist


    -3
    echo -e "o\nn\np\n1\n\n\nw\n" | fdisk /dev/sdX
    bunam · 2012-04-05 13:04:40 0
  • Suppose you made a backup of your hard disk with dd: dd if=/dev/sda of=/mnt/disk/backup.img This command enables you to mount a partition from inside this image, so you can access your files directly. Substitute PARTITION=1 with the number of the partition you want to mount (returned from sfdisk -d yourfile.img). Show Sample Output


    6
    INFILE=/path/to/your/backup.img; MOUNTPT=/mnt/foo; PARTITION=1; mount "$INFILE" "$MOUNTPT" -o loop,offset=$[ `/sbin/sfdisk -d "$INFILE" | grep "start=" | head -n $PARTITION | tail -n1 | sed 's/.*start=[ ]*//' | sed 's/,.*//'` * 512 ]
    Alanceil · 2009-03-06 21:29:13 3
  • Creates a temporary ram partition To use: ram 3 to make a 3gb partition (Defaults to 1gb) Show Sample Output


    3
    ram() { mt=/mnt/ram && grep "$mt" < /proc/mts > /dev/null; if [ $? -eq 0 ] ; then read -p"Enter to Remove Ram Partition ";sudo umount "$mt" && echo $mt 0; else sudo mt -t tmpfs tmpfs "$mt" -o size=$(( ${1:-1} * 1024 ))m && echo $mt '-' "${1:-1}"gb; fi; }
    snipertyler · 2013-12-13 05:22:02 0
  • Creates a single primary partition starting at sector 0 and extending to the end of the disk. Use with care.


    0
    echo "0,,L" | sfdisk /dev/sdX
    twobitsprite · 2012-04-09 18:36:24 0

What Others Think

See also http://www.pixelbeat.org/scripts/disk_grep That will output dd commands you can use to dump matching blocks, which you can then edit with vim or whatever to recover deleted files for example. I've used this far too often
pixelbeat · 392 weeks ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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