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gzip (GNU zip) is a compression utility designed to be a
replacement for compress. Its main advantages over compress
are much better compression and freedom from patented algorithms.
It has been adopted by the
GNU project and is now relatively popular
on the Internet.
gzip was written by Jean-loup Gailly
Mark Adler for
the decompression code.
gzip produces files with a .gz extension.
gunzip can decompress files created by gzip, compress or
pack. The detection of the input format is automatic.
The format of the .gzfiles generated by gzip is
described in RFCs (Request For Comments)
gzip is a command line tool for advance users only. If you are a newbie, use 7 zip instead.