ecm-compress(1) [debian man page]

ECM-COMPRESS(1) 					      General Commands Manual						   ECM-COMPRESS(1)

NAME

       ecm-compress - selectively strips error correction codes from CD images

SYNOPSIS

       ecm-compress  cdimagefile [ecmfile]

DESCRIPTION

       ecm-compress  reduces  the  size  of a CD image file (ISO, BIN, CDI, NRG, CCD or any other format that uses raw sectors) by eliminating the
       Error Correction Codes (EEC) and Error Detection Codes (EDC) from each sector when possible.

       Since the data ecm-compress strips is usually nearly impossible to compress with traditional tools, the resulting ECM  file  will  compress
       far better than the raw CD image.

       Hard drives already have mechanisms to protect data integrity, EEC/EDC data can thus be discarded safely.

       This data can then be generated again using the command ecm-uncompress.

       Because	ecm-compress only discards EDC/ECC data for sectors where it's verifiably possible to recreate that data, the process is lossless.
       In case of copy protection, ecm-compress will preserve the bogus data.

EXAMPLES

       ecm-compress foo.bin
	      strips the ECC/EDC data from the foo.bin CD image and save the resulting file as foo.bin.ecm

       ecm-compress foo.img foobar
	      strips the ECC/EDC data from the foo.img CD image and save the resulting file as foobar

SEE ALSO

       ecm-uncompress(1).

AUTHOR

       ecm-compress was written by Neill Corlett.

       This manual page was written by Loic Martin <loic.martin3@gmail.com>, for the Debian project (but may be used by others), using	the  docu-
       mentation written by ECM author Neill Corlett.

								 December 22, 2008						   ECM-COMPRESS(1)

WORD-LIST-COMPRESS(1)					 Aspell Abbreviated User's Manual				     WORD-LIST-COMPRESS(1)

NAME

       word-list-compress - word list compressor/decompressor for GNU Aspell

SYNOPSIS

       word-list-compress c[ompress] | d[ecompress]

DESCRIPTION

       word-list-compress compresses or decompresses sorted word lists for use with the GNU Aspell spell checker.

COMMANDS

       -c, c, compress
	      compress the plain text word list read from standard input.

       -d, d, decompress
	      decompress the compressed word list read from standard input.

EXAMPLES

       Here are a few examples of how you can use word-list-compress

       word-list-compress d <wordlist.cwl >wordlist.txt
	      Decompress file wordlist.cwl to text file wordlist.txt

       word-list-compress c <wordlist.wl >wordlist.cwl 2>errors.txt
	      Compress wordlist.wl to wordlist.cwl and send any error messages to a text file named errors.txt

       LC_COLLATE=C sort -u <wordlist.txt | word-list-compress c >wordlist.cwl
	      Sort a word list, then pipe it to word-list-compress to create a compressed binary wordlist.cwl file.

       word-list-compress d <words.cwl | aspell create master ./words.rws
	      Decompress a wordlist, then pipe it to aspell(1) to create a spelling list.  Please check the aspell(1) info manual for proper usage
	      and options.

TIPS

       Word-list-compress is best used with sorted word list type files.  It is not a general purpose  compression  program  since  the  resulting
       files may actually increase in size.

       Word-list-compress  accepts  up to 255 text characters in the range of {0x21...0xFF}. If your word list requires a larger character set for
       certain languages or longer length for multi-word, scientific, medical, technical or other use, then it is recommended  that  you  compress
       your word list using prezip-bin(1)

DIAGNOSTICS

       Word-list-compress  normally exits with a return code of 0. If it encounters an error, a message is sent to standard error output (stderr),
       and word-list-compress exits with a non-zero return value.  Error messages are listed below:

       (display help/usage message)
	      Unknown command given on the command line so word-list-compress displays a usage message to standard error output.

       Corrupt Input
	      This is only for the decompression command d.  The input file is of an unknown format or the input file/stream  is  corrupted.   You
	      may  have  some valid output, but word-list-compress could not complete the process.  If the input file is a compressed wordlist but
	      you have no output file, then it may be a newer prezip-bin(1) version of compressed file, if so, try  decompressing  the	file  with
	      prezip-bin(1) instead.

       Output Data Error
	      The output is full, write protected, or has an error and can no longer be written to.

SEE ALSO

       aspell(1), aspell-import(1), prezip-bin(1), run-with-aspell(1)

       Aspell is fully documented in its Texinfo manual.  See the `aspell' entry in info for more complete documentation.

REPORTING BUGS

       For help, see the Aspell homepage at <http://aspell.net> and send bug reports/comments to the Aspell user list at the above address.

AUTHOR

       This manual page was written by Aaron Lehmann <aaronl@vitelus.com>, Brian Nelson <pyro@debian.org> and Jose Da Silva <digital@joescat.com>.

GNU
								    2005-09-05						     WORD-LIST-COMPRESS(1)