DD(1) DD(1) dd - convert and copy a file dd []... dd , . bs= (: 512); ,,ibs" ,,obs" cbs= conv= count=N N ibs= ( : 512) if= iflag= obs= ( : 512) of= oflag= seek=N (or oseek=N) skip N obs-sized output blocks skip=N (or iseek=N) skip N ibs-sized input blocks status= ; ,,none" , ,,noxfer" , ,,progress" N and BYTES may be followed by the following multiplicative suffixes: 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, and so on for T, P, E, Z, Y, R, Q. Binary prefixes can be used, too: KiB=K, MiB=M, and so on. If N ends in 'B', it counts bytes not blocks. : ascii - ebcdic - ibm - block - unblock - lcase ucase sparse - swab sync -; , excl nocreat notrunc noerror fdatasync fsync , : append ( ; ,,conv=notrunc") direct / dsync / sync , fullblock ( ,,iflag") nonblock - / noatime nocache . ,,oflag=sync" noctty nofollow %s ,,dd" / . : --help --version , . coreutils: Copyright (C) 2023 Free Software Foundation, Inc. 3+: 3 . : . , . ,,info '(coreutils) dd invocation'" ; 3 . . , - TODO <>. coreutils 9.4 2024 DD(1)