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NAME

gzip, gunzip - compression and decompression utilities

SYNOPSIS

gzip [ -v ] [ -level ] [ file... ]
gunzip [ file... ]

DESCRIPTION

Gzip and gunzip perform data compression and decompression compatible with the Unix gzip file format, which uses a hybrid Lempel-Ziv 1977 and Huffman compression algorithm called `deflate'. If no arguments are given gzip compresses each file replacing it by a file of the same name with the a .gz suffix appended. If no files are given, standard input and standard output are used. Level is a single decimal digit between 1 and 9; higher numbers give better compression. The default level is 6. The -v option causes gzip to report the compression ratio of each file that it compresses.

Gunzip performs the opposite operation to gzip; each file (which must have a .gz suffix) is uncompressed, and replaced by a file of the same name with the .gz suffix removed. If no files are given, standard input and standard output are used.

SOURCE

/appl/cmd/gzip.b
/appl/cmd/gunzip.b

SEE ALSO

filter(2), filter-deflate(2)

GZIP(1 ) Rev:  Thu Feb 15 14:42:47 GMT 2007