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GNU ddrescue 1.8 (Stable branch)

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Special Forums News, Links, Events and Announcements Software Releases - RSS News GNU ddrescue 1.8 (Stable branch)
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Old 02-25-2008
GNU ddrescue 1.8 (Stable branch)
Image GNU ddrescue is a data recovery tool. It copies data from one file or block device (hard disc, cdrom, etc) to another, trying hard to rescue data in case of read errors. GNU ddrescue does not truncate the output file if not asked to. So, every time you run it on the same output file, it tries to fill in the gaps. The basic operation of GNU ddrescue is fully automatic. That is, you don't have to wait for an error, stop the program, read the log, run it in reverse mode, etc. If you use the logfile feature of GNU ddrescue, the data is rescued very efficiently (only the needed blocks are read). Also you can interrupt the rescue at any time and resume it later at the same point. License: GNU General Public License v3 Changes:
The new option "--synchronous" has been added. The new option "--generate-logfile" has been added. Fill mode now also works when the outfile offset differs from zero. The "Fill Mode" chapter of the manual has been updated.Image

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truncate

TRUNCATE(1)							   User Commands						       TRUNCATE(1)

NAME

       truncate - shrink or extend the size of a file to the specifed size

SYNOPSIS

       truncate OPTION... FILE...

DESCRIPTION

       Shrink or extend the size of each FILE to the specified size

       A FILE argument that does not exist is created.

       If  a  FILE  is	larger than the specified size, the extra data is lost.  If a FILE is shorter, it is extended and the extended part (hole)
       reads as zero bytes.

       Mandatory arguments to long options are mandatory for short options too.

       -c, --no-create
	      do not create any files

       -o, --io-blocks
	      Treat SIZE as number of IO blocks instead of bytes

       -r, --reference=FILE
	      use this FILE's size

       -s, --size=SIZE
	      use this SIZE

       --help display this help and exit

       --version
	      output version information and exit

       SIZE is a number which may be followed by one of the following suffixes: KB 1000, K 1024, MB 1000*1000, M 1024*1024, and so on for G, T, P,
       E, Z, Y.

       SIZE  may also be prefixed by one of the following modifying characters: `+' extend by, `-' reduce by, `<' at most, `>' at least, `/' round
       down to multiple of, `%' round up to multiple of.

       Note that the -r and -s options are mutually exclusive.

AUTHOR

       Written by Padraig Brady.

REPORTING BUGS

       Report truncate bugs to bug-coreutils@gnu.org
       GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
       General help using GNU software: <http://www.gnu.org/gethelp/>

COPYRIGHT

       Copyright (C) 2009 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       dd(1), truncate(2), ftruncate(2)

       The full documentation for truncate is maintained as a Texinfo manual.  If the info and truncate programs are properly  installed  at  your
       site, the command

	      info coreutils 'truncate invocation'

       should give you access to the complete manual.

GNU coreutils 7.1						     July 2010							       TRUNCATE(1)