Preparing an image drive to copy files to is the first step in Linux forensics. For this purpose, what would the following command accomplish? dcfldd if=/dev/zero of=/dev/hda bs=4096 conv=noerror, sync
Preparing an image drive to copy files to is the first step in Linux forensics. For this purpose, what would the following command accomplish? dcfldd if=/dev/zero of=/dev/hda bs=4096 conv=noerror, sync
The command 'dcfldd if=/dev/zero of=/dev/hda bs=4096 conv=noerror, sync' is used to fill the disk with zeros. The 'if=/dev/zero' specifies that the input file is /dev/zero, which is a special file that provides as many null characters (zeros) as are read from it. The 'of=/dev/hda' specifies that the output file (where the zeros will be written) is the entire hda device. The 'bs=4096' sets the block size to 4096 bytes, and 'conv=noerror, sync' tells the program to continue operation despite read errors and to pad each block to the full block size. This command effectively overwrites the entire disk with zeros.
A < One of the main uses of /dev/zero is to provide a data source for various programs and scripts that require a stream of zeros.
The command dcfldd if=/dev/zero of=/dev/hda bs=4096 conv=noerror, sync would fill the disk with zeros. It writes zeros to the entire /dev/hda device, effectively wiping its contents.