|GZIP(1)||General Commands Manual||GZIP(1)|
compression/decompression tool using Lempel-Ziv coding
gzip program compresses and
decompresses files using Lempel-Ziv coding (LZ77). If no
files are specified,
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
suffix option, added, if possible. In decompression
mode, each file will be checked for existence, as will
the file with the suffix added.
If invoked as
gunzip then the
-d option is enabled. If invoked as
gzcat then both the
-d options are
The following options are available:
-1option being the fastest, with less compression, and the
-9option being the slowest, with optimal compression. The default compression level is 6.
-coption, allowing non-compressed data to pass through unchanged.
-voption, it also displays the compression method, CRC, date and time embedded in the file.
gzipthe files in a directory tree individually, using the fts(3) library.
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
gzip program was originally written by
Jean-loup Gailly, licensed under the GNU Public Licence. Matthew R. Green
wrote a simple front end for NetBSD 1.3 distribution
media, based on the freely re-distributable zlib library. It was enhanced to
be mostly feature-compatible with the original GNU
gzip program for NetBSD
This manual documents NetBSD
gzip version 20150113.
This implementation of
gzip was written by
Matthew R. Green
|January 13, 2015||NetBSD-7.0.1|