Name

dd - copy blocks of data

Synopsis

$ dd if=[input_file] of=[output_file] [args...]

Description

dd is an application used to write blocks of data from one file to another. A common use case for dd is to make a bootable hard drive from a ISO file.

Options

• --help: Display help message and exit

Arguments

• if: input file (or device) to read from (default: stdin)
• of: output file (or device) to write to (default: stdout)
• bs: block size (of bytes) to use (default: 512)
• count: number of blocks to write
• seek: number of output blocks to skip (default: 0)
• skip: number of input blocks to skip (default: 0)
• status: level of output (default: default)
  • default: error messages + final statistics
  • none: just error messages
  • noxfer: no final statistics

Examples

$ dd if=/dev/zero of=./zeros bs=1M count=1