DD(1) DD(1) dd - dd []... dd , . bs=BYTES (: 512); ibs obs cbs=BYTES conv=CONVS count=N N ibs=BYTES (: 512) if=FILE iflag=FLAGS obs=BYTES (: 512) of=FILE oflag=FLAGS seek=N ( oseek=N) N obs skip=N ( iseek=N) N ibs status=LEVEL , ; <> -- , , <> -- , <> -- : 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 'B', , . : ascii EBCDIC ASCII ebcdic ASCII EBCDIC ibm ASCII EBCDIC block cbs unblock cbs lcase ucase sparse , NUL swab sync NUL ibs; block unblock NUL 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. : GNU coreutils: GNU: - (C) 2026 Free Software Foundation, Inc. GPLv3+: GNU GPL 3 . : . , , . . : info '(coreutils) dd invocation' Yuri Chornoivan ; , GNU General Public License Version 3 . . , , : . GNU coreutils 9.11 2026 DD(1)