Backup the entire hard disk dd command can back up an entire copy of a hard disk to another hard disk connected to the same system.
Some of the most common uses of the dd command are:ġ. conv - This option is used so that the process of copying continues even if there are any read errors. count - This option is used to specify the number of blocks to be copied (by default, the dd command copies the entire file or disk)ĥ. bs - This option is used to specify the block size, i.e., number of bytes or kilobytes(k) or megabytes(m)Ĥ. if - This option is used to specify an output file or deviceģ. If - This option is used to specify an input file or deviceĢ. The basic dd command syntax consists of the following:ġ. By default, the dd command reads from stdin and writes to stdout these can be modified using its input file and output file options. The dd command's syntax differs from various other Unix programs, as it uses syntax option=value rather than the standard syntax -option value or -option=value formats.
Dd is a command-line utility for Linux and Unix systems whose primary purpose is to convert and create low-level file copy.
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