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TOC

DD(1)                                                                    DD(1)



dd -

dd

       [--help]   [--version]   [if=file]  [of=file]  [ibs=bytes]  [obs=bytes]
       [bs=bytes]  [cbs=bytes]  [skip=blocks]   [seek=blocks]   [count=blocks]
       [conv={ascii, ebcdic, ibm, block, unblock, lcase, ucase, swab, noerror,
       notrunc, sync}]

dd

       ()


       dd
        ( 512 )
        1 bs=bytes

       sync, noerror, notrunc

        ()


       sync


       sync

        NUL  ()

        1



        () x  2


       if=file

              file


       of=file

              file

              conv=notrunc

              dd

              file
               (: ) 0  ( seek= )

       ibs=bytes

              bytes
               512

       obs=bytes

              bytes
               512

       bs=bytes

              bytes

              ibs

              obs

              ( sync, noerror, notrunc

              bs

              ibs

              obs


              bs


              )

       cbs=bytes
              block

              unblock


       skip=blocks
              ibs

              blocks


       seek=blocks

              obs

              blocks


       count=blocks

              ibs

              blocks


       conv=CONVERSION[,CONVERSION]...

              CONVERSION ()




              ascii  EBCDIC  ASCII

              ebcdic ASCII  EBCDIC

              ibm    ASCII  (IBM ) EBCDIC

              block   cbs




              unblock

                     cbs



              lcase

              ucase

              swab    (2) GNU dd


                      ()

              noerror


              notrunc

                     (:

                     )

              sync   block  unblock

                     ibs
                      NUL ( 0)


GNU

       --help

       --version


       --


 B
       10  D

        `1KB'  `1024' `1KD'  `1000'
        b (512 )c (1 ) w ( - System V  2 4.2BSD  4 )  3
        B  D

       k      :  2^10 = 102410  10^3 = 1000

       M      : 2^20 = 1,048,576  10^6 = 1,000,000

       G      : 2^30 = 1,073,741,824  10^9 = 1,000,000,000

       T      : 2^40 = 1,099,511,627,776  10^12 = 1,000,000,000,000

       P      : 2^50 = 1,125,899,906,842,624
               10^15 = 1,000,000,000,000,000

       E      : 2^60 = 1,152,921,504,606,846,976
               10^18 = 1,000,000,000,000,000,000

       Z      : 2^70 = 1,180,591,620,717,411,303,424
               10^21 = 1,000,000,000,000,000,000,000

       Y      : 2^80 = 1,208,925,819,614,629,174,706,176
               10^24 = 1,000,000,000,000,000,000,000,000


        LANG, LC_ALL, LC_CTYPE, LC_MESSAGES


       POSIX 1003.2


        fileutils-4.1 dd ;

        aeb [AT] cwi.nl, aw [AT] mail1.fi, ragnar [AT] ragnar-hojland.com

        bug-fileutils [AT] gnu.org



GNU fileutils 4.1                18 June 2002                            DD(1)

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