from.hell

Forcing hard reboot ( like pressign reboot button ), helpfull in some extreme situations ;]

reboot:
echo 1 > /proc/sys/kernel/sysrq
echo b > /proc/sysrq-trigger


shutdown:
echo 1 > /proc/sys/kernel/sysrq
echo o > /proc/sysrq-trigger


root@ubuntu:/media/disk-1# ls -al
total 39082701
drwxrwxrwx 1 root root 4096 2009-07-12 13:33 .
drwxr-xr-x 4 root root 4096 2009-08-18 19:04 ..
-rwxrwxrwx 1 root root 878 2009-07-07 11:46 fdisk
-rwxrwxrwx 1 root root 701 2009-07-07 11:47 hdparm
-rwxrwxrwx 2 root root 40020664320 2009-07-07 14:34 image-sda
-rwxrwxrwx 1 root root 43 2009-07-07 12:02 md5sum
-rwxrwxrwx 1 root root 43 2009-06-29 13:13 md5sum-sda
drwxrwxrwx 1 root root 0 2009-07-11 19:03 $RECYCLE.BIN
root@ubuntu:/media/disk-1# fdisk -ul image-sda
You must set cylinders.
You can do this from the extra functions menu.



Disk image-sda: 0 MB, 0 bytes
255 heads, 63 sectors/track, 0 cylinders, total 0 sectors
Units = sectors of 1 * 512 = 512 bytes
Disk identifier: 0x9c879c87


Device Boot Start End Blocks Id System
image-sda1 * 63 78140159 39070048+ 7 HPFS/NTFS
Partition 1 has different physical/logical endings:
phys=(1023, 254, 63) logical=(4863, 254, 63)


root@ubuntu:/media/disk-1# mount -o ro,loop,offset=32256 -t auto image-sda /media/image


The magic “32256″ offset passed to “mount” is easily explained as the start of the partition you are interested in (63 in this case) multiplied by the unit size (512 in this case). If you have more than one partition, just repeat the above steps for the other slices.

http://isc.sans.org/diary.html?storyid=6991