DD(1) DD(1) dd -- dd []... dd , . bs=BYTES _ ( 512); ibs obs cbs=BYTES _ conv=CONVS count=N N ibs=BYTES _ ( 512) if=FILE read from FILE instead of standard input iflag=FLAGS obs=BYTES _ ( 512) of=FILE write to FILE instead of standard output oflag=FLAGS seek=N (or oseek=N) skip N obs sized output blocks skip=N (or iseek=N) skip N ibs sized input blocks status=LEVEL The LEVEL of information to print to standard error; 'none' suppresses everything but error messages, 'noxfer' suppresses the final transfer statistics, 'progress' shows periodic transfer statistics N _ -: c=1, w=2, b=512, kB=1000, K=1024, MB=1000*1000, M=1024*1024, xM=M, GB=1000*1000*1000, G=1024*1024*1024 T, P, E, Z, Y, R, Q. : KiB=K, MiB=M . N <>, , . : ascii EBCDIC ASCII ebcdic ASCII EBCDIC ibm ASCII EBCDIC block , , cbs unblock , cbs, lcase ucase sparse , swab sync ibs; block unblock excl , nocreat notrunc noerror fdatasync fsync , : append ( ; conv=notrunc) direct - directory , dsync - sync , fullblock ( iflag) nonblock - noatime nocache . . oflag=sync noctty nofollow USR1 <
> - . : --help --version (Paul Rubin), (David MacKenzie) (Stuart Kemp). bug-coreutils@gnu.org GNU coreutils: GNU: Copyright (C) 2026 Free Software Foundation, Inc. GPLv3+: GNU GPL 3 . : . , . , info '(coreutils) dd invocation' () ; GNU (GNU General Public License - GPL, 3 ) , - . - , , () () () . GNU coreutils 9.11 2026 . DD(1)