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rdiff(1)		    General Commands Manual		      rdiff(1)

NAME
       rdiff - compute and apply signature-based file differences

SYNOPSYS
       rdiff [options] signature old-file signature-file

       rdiff [options] delta signature-file new-file delta-file

       rdiff [options] patch old-file delta-file new-file

USAGE
       You  can	use rdiff to update files, much	like rsync does.  However, un-
       like rsync, rdiff puts you in control.  There are three steps to	updat-
       ing a file: signature, delta, and patch.	Use the	 signature  subcommand
       to  generate  a	small  signature-file from the old-file. Use the delta
       subcommand to generate a	small delta-file from  the  signature-file  to
       the  new-file.  Use the patch subcommand	to apply the delta-file	to the
       old-file	to regenerate the new-file.

DESCRIPTION
       In every	case where a filename must be specified, - may be used instead
       to mean either standard input or	standard output	 as  appropriate.   Be
       aware  that  if you do this, you'll need	to terminate your options with
       -- or rdiff will	think you are passing it an empty option.

RETURN VALUE
       0 for successful	completion, 1 for  environmental  problems  (file  not
       found,  invalid options,	IO error, etc),	2 for a	corrupt	file and 3 for
       an internal error or unhandled situation	in librsync or rdiff.

SEE ALSO
       librsync(3)

AUTHOR
       Martin Pool <mbp@sourcefrog.net>

       The original rsync algorithm was	discovered by Andrew Tridgell.

       rdiff development has been supported by Linuxcare,  Inc	and  VA	 Linux
       Systems.

				    $Date$			      rdiff(1)

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