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Topic: Dd (Unix)

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	DD - Wikipedia, the free encyclopedia
		DoorDarshan, the Indian national TV broadcaster is commonly known as DD in India.
		DD Media Group, international independent originator, producer and distributor of content and concepts for (interactive) television.
		The digraph Dd, which in Welsh is pronounced /ð/ (like the voiced "th" of "this").
	en.wikipedia.org /wiki/DD (432 words)

	Dd (Unix) - Wikipedia, the free encyclopedia
		dd is a common Unix program whose primary purpose is the low-level copying and conversion of files.
		Because dd can copy entire partitions or disks (this is more due to Unix providing access to these devices than the functionality of dd per se), it is used in computer forensics when the contents of a partition need to be preserved in a byte-exact copy.
		The command line syntax of dd is unlike that of any other Unix program; a violation of the Unix philosophy of using a common syntax for all command line tools.
	en.wikipedia.org /wiki/Dd_(Unix) (1086 words)

	Dd - LQWiki
		Originally the name of a Unix copy command with special options suitable for block-oriented devices; it was often used in heavy-handed system maintenance, as in "Let's dd the root partition onto a tape, then use the boot PROM to load it back on to a new disk".
		The Unix dd(1)was designed with a weird, distinctly non-Unixy keyword option syntax reminiscent of IBM System/360 JCL (which had an elaborate DD "Dataset Definition" specification for I/O devices); though the command filled a need, the interface design was clearly a prank.
		The jargon usage is now very rare outside Unix sites and now nearly obsolete even there, as dd(1) has been deprecated for a long time (though it has no exact replacement).
	wiki.linuxquestions.org /wiki/Dd (1071 words)

	Linux sg_dd utility (a dd variant)
		Those familiar with the dd command should not be too surprised by the syntax and semantics of the sg_dd utility.
		Those not familiar with the dd syntax should be very careful, especially with the 'of' and 'seek' options, both with dd and sg_dd.
		In the Unix dd command style, sg_dd outputs two lines on completion that show the number of full and partial records in (on the first line) and out (on the second line).
	sg.torque.net /sg/sg_dd.html (3870 words)

	dd
		When finished, dd displays the number of complete and partial input and output blocks and truncated input records to the standard error output.
		If dd receives a SIGINFO (see the status argument for stty(1)) signal, the current input and output block counts will be written to the standard error output in the same format as the standard completion message.
		If dd receives a SIGINT signal, the current input and output block counts will be written to the standard error output in the same format as the standard completion message and dd will exit..
	www.ss64.com /osx/dd.html (1337 words)

	Unix (Site not responding. Last check: 2007-10-09)
		Unix was developed by AT&T's Bell Laboratories in the USA during the late 1960s, using the programming language C.
		Its wide range of functions and flexibility, together with the fact that it was available free of charge from 1976 to 1983, led to its wide use by universities and in commercial software.
		In the 1990s, AT&T's Unix System Laboratories was taken over by Novell, which later sold it to the SCO Group.
	www.currant-bum.com /reference/encyclopaedia/hutchinson/m0008929.html (304 words)

	Bin's On-Line Dictionary (Site not responding. Last check: 2007-10-09)
		dd A Unix copy command with special options suitable for block-oriented devices; it was often used in heavy-handed system maintenance, as in "Let's "dd" the root partition onto a tape, then use the boot PROM to load it back on to a new disk".
		The Unix "dd" was designed with a weird, distinctly non-Unixy keyword option syntax reminiscent of IBM System/360 JCL (which had an elaborate DD "Dataset Definition" specification for I/O devices); though the command filled a need, the interface design was clearly a prank.
		The jargon usage is now very rare outside Unix sites and now nearly obsolete even there, as "dd" has been deprecated for a long time (though it has no exact replacement).
	language.bin.org /ref/dict/?t=dd (307 words)

	[No title]
		UNIX does not support IBM Standard Label tapes In addition to user data files, IBM SL tapes contain labels which themselves are physical files on the tape.
		To process IBM SL tapes on UNIX, use a norewind device (e.g., /dev/rmt/0mn) and the mt command with the fsf subcommand to position the tape to the desired user data file.
		The UNIX command tar can be used to move the SAS data sets to/from the staging directory from/to tape.
	support.sas.com /techsup/technote/ts473.txt (812 words)

	dd \| Linux Journal
		Since dd is the tool used to write disk headers, boot records, and similar system data areas, misuse of dd has probably trashed many hard disks and file systems.
		A typical use of dd is to skip executable headers and begin writing in the middle of a device, skipping volume and partition data.
		GNU dd is found in the fileutils collection, with the current version at the URL ftp://prep.ai.mit.edu/pub/gnu/fileutils-3.12.tar.gz or a mirror near you.
	www.linuxjournal.com /article/1320 (1373 words)

	Thomas Rude - DD and Computer Forensics
		DD can be thought of as tool - in the sense that using it is a means of building an evidence file.
		What is special about the DD copy command is that it has special flags available to it that make it suitable for copying block-oriented devices, such as tapes.
		DD is capable of addressing these block devices sequentially.
	www.crazytrain.com /dd.html (864 words)

	Open Source UNIX Forensic Tools
		Description: 'dd' is a common UNIX tool that copies data from one file to another.
		It is a simple Unix utility which reads and writes data across network connections, using TCP or UDP protocol.
		sdd is much faster than dd in cases where input block size (ibs) is not equal to the output block size (obs).
	www.opensourceforensics.org /tools/unix.html (2576 words)

	TS-DOC: TS-473 - Processing Tapes with the SAS System in the UNIX Environment
		Due to the infrequent use of tapes in the UNIX environment, this topic has been somewhat of an enigma for a number of SAS users.
		As is the case when dealing with any external file in SAS, the FILENAME statement is used to establish a fileref; all other SAS statements in a given program remain the same whether the external file resides on disk or tape.
		UNIX does not support IBM® Standard Label tapes UNIX does not support multi-volume tapes The DCB characteristics of the file must be known.
	support.sas.com /techsup/technote/ts473.html (1231 words)

	Reading Tapes
		The no-swap device and a block size of 63.5 KB are used, which translates to a blocking factor of 127.
		Files are compressed using the standard UNIX "compress", indicated by a ".Z" appended to the data file name.
		The same utility that was used to create the tape, "dd" or "tar", must be used to access the data.
	daac.gsfc.nasa.gov /landbio/tapes.comp.shtml (437 words)

	dd - Man Pages at IceWalkers.com
		DD(1) DD(1) NAME dd - convert and copy a file SYNOPSIS dd[--help][--version][if=file][of=file][ibs=bytes][obs=bytes] [bs=bytes][cbs=bytes][skip=blocks][seek=blocks][count=blocks] [conv={ascii,ebcdic,ibm,block,unblock,lcase,ucase,swab,noerror, notrunc,sync}] DESCRIPTION dd copies a file (from standard input to standard output, by default) using specific input and output blocksizes, while optionally performing conversions on it.
		Unless conv=notrunc is given, dd truncates file to zero bytes (or the size specified with seek=).
		BUGS Commands like âdd if=myfile of=/dev/fd0 bs=1k seek=172â fail on some systems because dd tries to truncate the output file, but truncation of a block device is not possible.
	www.icewalkers.com /Linux/ManPages/dd-1.html (544 words)

	Backup using dd command in linux
		The ' dd ' command is one of the original Unix utilities and should be in everyone's tool box.
		Like most well-behaved commands, dd reads from its standard input and writes to its standard output, unless a command line specification has been given.
		This allows dd to be used in pipes, and remotely with the rsh remote shell command.
	www.debianhelp.co.uk /ddcommand.htm (315 words)

	Task: Add an Unix "dd" image file to a project
		ProDiscover® supports analysis of "dd" images on supported file systems for forensics examiners using UNIX "dd", or the Win32 "dd" port to create physical or logical images.
		UNIX style "dd" images can be added to projects.
		If the "dd" image is split into several images they should be numbered sequentially and all contain a.eve or any other desired file extension.
	techpathways.com /webhelp/Add_an_Unix__dd__image_file_to_a_project.htm (216 words)

	Unix dd command and image creation
		The dd command in UNIX and its ported variants for windows (for example the implementation from SFU 3.5) can be used to do direct dumps from one device to file or vise versa.
		The dd command line says, "Reading from the input file /dev/fd0, write all of the data to the file dosboot.img." dd doesn't try to find lines of data or individual files on the disk; it does a binary copy of the bytes from first to last.
		When dd reads from a pipe, using the ibs=X and obs=Y operands, the output will always be blocked in chunks of size Y. When bs=Z is used, the output blocks will be whatever was available to be read from the pipe at the time.
	www.softpanorama.org /Tools/dd.shtml (11477 words)

	Tutorials - UNIX Viruses
		Unix-virus was created to discuss viruses in the unix environment from the point of view of the virus creator, and the security developer writing anti-virus software.
		It is possible to extend the data segment, however this isn't preferred, as its not UNIX portable that properly implement execute memory protection.
		Automated virus detection of these variety of UNIX virus is practical by detecting missing section headers and/or entry points to non permissible sections or segments.
	vx.netlux.org /lib/static/vdat/tuunix01.htm (5671 words)

	operating system (Site not responding. Last check: 2007-10-09)
		Many operating systems are written to run on specific computers, but some are available from third-party software houses and will run on machines from a variety of manufacturers.
		Examples include Apple's Macintosh OS X, Microsoft's Windows, and Unix.
		Unix (developed at AT&T's Bell Laboratories) is the standard on workstations, minicomputers, and supercomputers; it is also used on desktop PCs and mainframes.
	www.curant-bum.org.uk /reference/encyclopaedia/hutchinson/m0005837.html (274 words)

	macosxhints.com - Recover a dead hard drive using dd
		I thought the dd process was the solution as the 3rd party drive tools all failed.
		I suspect dd could be useful in other ways such as reporting areas on the disk with unrecoverable read errors.
		DD is showing a "device not confiugred" error as it's working, so we'll see how it works when it finishes up.
	www.macosxhints.com /article.php?story=20050302225659382 (3170 words)

	Atmospheric Dynamics Educational Resources
		Tapes are created with UNIX utilities "dd" and "tar" on a Silicon Graphics 440 system.
		If compressed files are requested, the data are compressed before the "dd" or "tar" utility is executed.
		To read "dd" format tapes on a VAX computer with a VMS operating system, simply use the "copy" command.
	daac.gsfc.nasa.gov /atmosphere/dynamics/documentation/tapes_comp.shtml (437 words)

	DataBlaster Technical Note - Using Standard Utilities to Transfer Data
		If your UNIX transfer program is already running, the mount will be immediately satisfied and data will begin to flow.
		All you have to do is specify the DataBlaster device name on the ‘dd’ command line as either an input device or an output device.
		After the ‘dd’ command is completed, the DataBlaster is immediately ready to transfer data again.
	www.bustech.com /support/techtips/db2/standard.htm (816 words)

	How Do I make Linux filesystem backup with dd \| nixCraft
		dd command is all in one tool to Copy a file, converting and formatting according to the options.
		Please note that dd is also capable of reading tapes that were created on other UNIX or written in a format other than Unix (like Windows 2000 server).
		dd is a fun and easy to use (real life saver), read the man page of dd for more information.
	cyberciti.biz /tips/how-do-i-make-linux-filesystem-backup-with-dd.html (698 words)

	DD - Biocrawler (Site not responding. Last check: 2007-10-09)
		A Unix program to copy and convert files
		This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title.
		You can find it there under the keyword Dd (http://en.wikipedia.org/wiki/Dd)The list of previous authors is available here: version history (http://en.wikipedia.org/w/index.php?title=Ddandaction=history).
	www.biocrawler.com /encyclopedia/Dd (242 words)

	Unidata Newsletter, Summer 1989 (Site not responding. Last check: 2007-10-09)
		The university is not alone in its migration to Unix.
		Unix is strongly predominant in all the systems we're looking at [other than IBM and DEC]," he said.
		The university is also considering porting Unix to the school's mainframe as part of an effort to emulate a supercomputer center, Strawn added.
	www.unidata.ucar.edu /newsletter/1989sum/89sumel.html (4396 words)

	Using External Files and Devices : Processing Files on TAPE
		However, using UNIX commands in your application means that the application will have to be modifed if it is ported to a non-UNIX environment.
		UNIX does not support IBM standard label tapes.
		IBM standard label tapes contain user data files and labels, which themselves are files on the tape.
	www.asu.edu /sas/sasdoc/sashtml/unixc/z0455940.htm (867 words)

	Unix/Linux Basics
		Unix folk are more apt to use floppies like you'd use a tape (Unix floppies CAN be used the Windows way, it's just not typical).
		The common Unix tools are "tar" and "cpio", which are very similar to BACKUP in concept and use, but they dispense with the unnecessary file system for such tasks.
		If it is a tar or cpio image, you can just ftp it to the Unix machine and use it as such without bothering to put it on a floppy at all.
	aplawrence.com /Basics/floppy.html (1248 words)

	The UNIX Forums - use of the DD command
		The UNIX Forums - use of the DD command
		Often a question comes up about what dd does with bad disk blocks.
		Use the dd command to copy the master disk to the clone disk.
	www.unix.com /showthread.php?t=7243 (593 words)

	Oracle tip: How to use UNIX to display row information
		The UNIX operating system can be used to probe into the Oracle data blocks.
		The dd command accepts a skip parameter that tells it how far into a file to travel.
		Once we run the dd command to read the Oracle data block, we can filter the output by piping it to the UNIX strings command to only show printable information.
	www.remote-dba.cc /oracle_tips_unix_row.htm (330 words)

	[No title]
		UNIX and OPEN LOOK are registered trademarks of UNIX System Laboratories, Inc., a wholly owned subsidiary of Novell, Inc. PostScript and Display PostScript are trademarks of Adobe Systems, Inc. All other product names mentioned herein are the trademarks of their respective owners.
		The UNIX operating system was developed by Ritchie and Thompson at Bell Laboratories in the early 1970s.
		UNIX System V Release 4 (SVR4), the result of a cooperative venture entered into by Sun Microsystems and ATandT, was announced in November of 1989.
	docs.sun.com /source/801-6735/801-6735.book (8099 words)

	Microsoft, SCO reach deal on Unix
		Microsoft Corp. yesterday struck an agreement over Unix, a faded rival to its Windows franchise, in a deal that some experts said could impede Linux, an operating system that Microsoft views as a much more serious threat.
		That company owns one of the numerous variations on the Unix operating system, which Microsoft saw as the main threat to Windows until the mid-1990s, before Linux came along.
		The concerns were over libraries (of Unix source code) being used in their products, whether those were appropriate or not.
	seattlepi.nwsource.com /business/122709_caldera20.html (540 words)

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