ref: 3efb5bbb4061056e523858b134c555949591efe2
dir: /man/1/gzip/
.TH GZIP 1 .SH NAME gzip, gunzip \- compression and decompression utilities .SH SYNOPSIS .B gzip [ .B \-v ] [ .BI \- level ] [ .IR file ... ] .br .B gunzip [ .IR file ... ] .SH DESCRIPTION .B Gzip and .B gunzip perform data compression and decompression compatible with the Unix .I gzip file format, which uses a hybrid Lempel-Ziv 1977 and Huffman compression algorithm called `deflate'. If no arguments are given .B gzip compresses each .I file replacing it by a file of the same name with the a .B .gz suffix appended. If no files are given, standard input and standard output are used. .I Level is a single decimal digit between 1 and 9; higher numbers give better compression. The default .I level is 6. The .B \-v option causes .B gzip to report the compression ratio of each file that it compresses. .PP .B Gunzip performs the opposite operation to .BR gzip ; each .I file (which must have a .B .gz suffix) is uncompressed, and replaced by a file of the same name with the .B .gz suffix removed. If no files are given, standard input and standard output are used. .SH SOURCE .B /appl/cmd/gzip.b .br .B /appl/cmd/gunzip.b .SH SEE ALSO .IR filter (2), .IR filter-deflate (2)