gzip, gunzip - compression and decompression utilities gzip [ -v ] [ - level ] [ file ... ]

gunzip [ file ... ]

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.

/appl/cmd/gzip.b

/appl/cmd/gunzip.b

filter (2), filter-deflate (2)