dd.1

Linux下文件工具。

.\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.28.
.TH DD "1" "July 2002" "dd (fileutils) 4.1.10" "User Commands"
.SH NAME
dd \- convert and copy a file
.SH SYNOPSIS
.B dd
[\fIOPTION\fR]...
.SH DESCRIPTION
.\" Add any additional description here
.PP
Copy a file, converting and formatting according to the options.
.TP
bs=BYTES
force ibs=BYTES and obs=BYTES
.TP
cbs=BYTES
convert BYTES bytes at a time
.TP
conv=KEYWORDS
convert the file as per the comma separated keyword list
.TP
count=BLOCKS
copy only BLOCKS input blocks
.TP
ibs=BYTES
read BYTES bytes at a time
.TP
if=FILE
read from FILE instead of stdin
.TP
obs=BYTES
write BYTES bytes at a time
.TP
of=FILE
write to FILE instead of stdout
.TP
seek=BLOCKS
skip BLOCKS obs-sized blocks at start of output
.TP
skip=BLOCKS
skip BLOCKS ibs-sized blocks at start of input
.TP
\fB\-\-help\fR
display this help and exit
.TP
\fB\-\-version\fR
output version information and exit
.PP
BLOCKS and BYTES may be followed by the following multiplicative suffixes:
xM M, c 1, w 2, b 512, kB 1000, K 1024, MB 1,000,000, M 1,048,576,
GB 1,000,000,000, G 1,073,741,824, and so on for T, P, E, Z, Y.
Each KEYWORD may be:
.TP
ascii
from EBCDIC to ASCII
.TP
ebcdic
from ASCII to EBCDIC
.TP
ibm
from ASCII to alternated EBCDIC
.TP
block
pad newline-terminated records with spaces to cbs-size
.TP
unblock
replace trailing spaces in cbs-size records with newline
.TP
lcase
change upper case to lower case
.TP
notrunc
do not truncate the output file
.TP
ucase
change lower case to upper case
.TP
swab
swap every pair of input bytes
.TP
noerror
continue after read errors
.TP
sync
pad every input block with NULs to ibs-size; when used
.IP
with block or unblock, pad with spaces rather than NULs
.SH AUTHOR
Written by Paul Rubin, David MacKenzie, and Stuart Kemp.
.SH "REPORTING BUGS"
Report bugs to <[e-mail]>.
.SH COPYRIGHT
Copyright \(co 2002 Free Software Foundation, Inc.
.br
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
.SH "SEE ALSO"
The full documentation for
.B dd
is maintained as a Texinfo manual.  If the
.B info
and
.B dd
programs are properly installed at your site, the command
.IP
.B info dd
.PP
should give you access to the complete manual.