Usage: dd [OPTION]... Copy a file, converting and formatting according to the options. bs=BYTES force ibs=BYTES and obs=BYTES cbs=BYTES convert BYTES bytes at a time conv=KEYWORDS convert the file as per the comma separated keyword list count=BLOCKS copy only BLOCKS input blocks ibs=BYTES read BYTES bytes at a time if=FILE read from FILE instead of stdin obs=BYTES write BYTES bytes at a time of=FILE write to FILE instead of stdout, don't truncate file seek=BLOCKS skip BLOCKS obs-sized blocks at start of output skip=BLOCKS skip BLOCKS ibs-sized blocks at start of input --help display this help and exit --version output version information and exit BYTES may be suffixed: by xM for multiplication by M, by c for x1, by w for x2, by b for x512, by k for x1024. Each KEYWORD may be: ascii from EBCDIC to ASCII ebcdic from ASCII to EBCDIC ibm from ASCII to alternated EBCDIC block pad newline-terminated records with spaces to cbs-size unblock replace trailing spaces in cbs-size records with newline lcase change upper case to lower case ucase change lower case to upper case swab swap every pair of input bytes noerror continue after read errors sync pad every input block with NULs to ibs-size Report bugs to fileutils-bugs@gnu.ai.mit.edu