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gzip (1)
  • gzip (1) ( Solaris man: Команды и прикладные программы пользовательского уровня )
  • >> gzip (1) ( FreeBSD man: Команды и прикладные программы пользовательского уровня )
  • gzip (1) ( Русские man: Команды и прикладные программы пользовательского уровня )
  • gzip (1) ( Linux man: Команды и прикладные программы пользовательского уровня )
  • gzip (8) ( Русские man: Команды системного администрирования )

  • BSD mandoc
     

    NAME

    
    
    gzip
    
     - compression/decompression tool using Lempel-Ziv coding (LZ77)
    
     
    

    SYNOPSIS

    [-cdfhkLlNnqrtVv [-S suffix ] ] file [file [... ] ]
    gunzip [-cfhkLNqrtVv [-S suffix ] ] file [file [... ] ]
    zcat [-fhV ] file [file [... ] ]  

    DESCRIPTION

    The program compresses and decompresses files using Lempel-Ziv coding (LZ77). If no files are specified, will compress from standard input, or decompress to standard output. When in compression mode, each file will be replaced with another file with the suffix, set by the -S suffix option, added, if possible.

    In decompression mode, each file will be checked for existence, as will the file with the suffix added. Each file argument must contain a separate complete archive; when multiple files are indicated, each is decompressed in turn.

    In the case of gzcat the resulting data is then concatenated in the manner of cat(1).

    If invoked as gunzip then the -d option is enabled. If invoked as zcat or gzcat then both the -c and -d options are enabled.

    This version of is also capable of decompressing files compressed using compress(1) or bzip2(1).  

    OPTIONS

    The following options are available:

    -1 , -fast
    -2 , 3 , 4 , 5 , 6 , 7 , 8
    -9 , -best
    These options change the compression level used, with the -1 option being the fastest, with less compression, and the -9 option being the slowest, with optimal compression. The default compression level is 6.
    -c , -stdout , -to-stdout
    This option specifies that output will go to the standard output stream, leaving files intact.
    -d , -decompress , -uncompress
    This option selects decompression rather than compression.
    -f , -force
    This option turns on force mode. This allows files with multiple links, overwriting of pre-existing files, reading from or writing to a terminal, and when combined with the -c option, allowing non-compressed data to pass through unchanged.
    -h , -help
    This option prints a usage summary and exits.
    -k , -keep
    Keep (don't delete) input files during compression or decompression.
    -L , -license
    This option prints license.
    -l , -list
    This option displays information about the file's compressed and uncompressed size, ratio, uncompressed name. With the -v option, it also displays the compression method, CRC, date and time embedded in the file.
    -N , -name
    This option causes the stored filename in the input file to be used as the output file.
    -n , -no-name
    This option stops the filename from being stored in the output file.
    -q , -quiet
    With this option, no warnings or errors are printed.
    -r , -recursive
    This option is used to the files in a directory tree individually, using the fts(3) library.
    -S suffix , --suffix suffix
    This option changes the default suffix from .gz to suffix
    -t , -test
    This option will test compressed files for integrity.
    -V , -version
    This option prints the version of the program.
    -v , -verbose
    This option turns on verbose mode, which prints the compression ratio for each file compressed.

     

    ENVIRONMENT

    If the environment variable GZIP is set, it is parsed as a white-space separated list of options handled before any options on the command line. Options on the command line will override anything in GZIP  

    SEE ALSO

    bzip2(1), compress(1), fts(3), zlib(3)  

    HISTORY

    The program was originally written by Jean-loup Gailly, licensed under the GNU Public Licence. Matthew R. Green wrote a simple front end for Nx 1.3 distribution media, based on the freely re-distributable zlib library. It was enhanced to be mostly feature-compatible with the original GNU program for Nx 2.0 .

    This implementation of was ported based on the Nx 20060927, and first appeared in Fx 7.0 .  

    AUTHORS

    This implementation of was written by An Matthew R. Green Aq mrg@eterna.com.au .  

    BUGS

    According to RFC 1952, the recorded file size is stored in a 32-bit integer and therefore it can not represent files that is bigger than 4GB in size. This limitation also applies to -l option of utility.


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    OPTIONS
    ENVIRONMENT
    SEE ALSO
    HISTORY
    AUTHORS
    BUGS


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