# man > preunzip(1)

[_PREZIP_(1)](https://www.chedong.com/phpMan.php/man/PREZIP/1/markdown)                         Aspell Abbreviated User's Manual                         [_PREZIP_(1)](https://www.chedong.com/phpMan.php/man/PREZIP/1/markdown)

## NAME
       prezip, preunzip, precat -  prefix delta compressor for Aspell

## SYNOPSIS
       precat [-dzhLV] [-cfksSq] [file ...]

## DESCRIPTION
       **prezip  **is  a  a  prefix delta compressor.  It is _not_ a general purpose compressor and should
       only be used on sorted word lists or other similar text files.  It will likely  _increase_  the
       size of binary data.

       If invoked as **prezip, **the default action is to compress.  If invoked as **preunzip, **the default
       action  is  to decompress.  If invoked as **precat, **the default action is to decompress to std‐
       out.

       If no file names are given then **prezip **will compress or decompress from the standard input to
       the standard output.  Short flags can be combined so that "-c **-s**" is the same as "-cs".

## OPTIONS
### -h --help
              display help

### -d --decompress
              force decompression

### -z --compress
              dorce compression

### -L --license
              display software license

### -V --version
              display version

### -c --stdout
              decompress to standard output

### -f --force
              force

### -k --keep
              keep input files

### -s --sort
              sort and remove duplicates before compressing

### -S --nocwl
              do not rename .wl suffix to .cwl (use .wl.pz instead)

### -q --quiet
              suppress all warnings

## AUTHOR
       This manual page was written by  Brian  Nelson  <<pyro@debian.org>>  based  on  the  output  of
       help2man.  Aspell is Copyright © 2002 Kevin Atkinson.

GNU                                          March 2010                                    [_PREZIP_(1)](https://www.chedong.com/phpMan.php/man/PREZIP/1/markdown)