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gzip (GNU zip) is a popular compression program data. gzip (GNU zip) is a popular data compression program.gzip (GNU zip) is a compression utility designed to replace the "compress". Its main advantages over compress are much better compression and made from patented algorithms. The GNU Project uses it as the standard compression program for its system.gzip currently using the default LZ77 algorithm used in zip 1.9 (the portable pkzip compatible archiver). The gzip format was however designed to accommodate compression algorithms. See below for a comparison of zip and gzip.gunzip can currently decompress files created by gzip, compress or pack. The detection of the input format is automatic. For the gzip format, gunzip checks a 32 bit CRC. For pack, gunzip checks the uncompressed length. The "compress" has been designed to allow consistency checks. However gunzip is sometimes able to detect a bad. Z file because there is some redundancy in the Z compression format. If you get an error when uncompressing a. Z, do not assume that the. Z is correct simply because the standard uncompress does not complain. This usually means that the standard uncompress does not check its input, and happily generates garbage output.gzip produces files with a. gz. Previous versions of gzip extension. z extension, which has already been used by the Huffman encoder "pack". gunzip can decompress. z files (packed or gzip). Several planned features are not yet supported (see TODO file). See the NEWS file for a summary of changes since 0.5. See INSTALL for installation instructions. Some answers to frequently asked questions are given in the INSTALL file, please read it. (In particular, please do not ask me again for an entry / etc / magic.) WARNING: on several systems, compiler bugs cause gzip to fail, especially when the options of optimization are on. See the section "Special targets" at the end of the INSTALL file for a list of known issues. For all machines, use "make check" to check that gzip was compiled correctly. Try compiling gzip without optimization if you have a problem. Usage: gzip [-cdfhlLnNrtvV19] [-S suffix] [file ...]- c - stdout write on standard output, keep original files unchanged-d - decompress decompress-f - force force overwrite of output file and compress links-h - help give this help-l - list list the contents of compressed-L - license display software license-n - no-name do not save or restore the original name and the 'hours-N - Name Save or restore the original name and time-q - quiet suppress all warnings-r - recursive operate recursively on directories-S. suf - suffix. Use suffix SUF. SUF on compressed files - the t-test test compressed file integrity-v - verbose mode-V - version display version number -1 - fast compress faster -9 - best compress better - Make rsync-rsyncable friendly archive file ... files to (de) compress. If none given, use standard input.