gzip.readme

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The applications "gzip" and "gunzip" are being supplied without
additional charge.

Please read gzip.COPYING for details on the license agreement for 
the distribution of gzip and gunzip.

Per the conditions for copying, found in gzip.COPYING, the
executables are provided without source code. Source code may
be obtained upon request within 3 years of the distribution of the
executables.

Source code may also be obtained over the Internet from:
	prep.ai.mit.edu:
	gatekeeper.dec.com:/pub/GNU
	ftp.uu.net:/systems/gnu
	wuarchive.wustl.edu:/systems/gnu
	nic.funet.fi:/pub/gnu

Questions about gzip or about the Free Software Foundation (FSF)
can be addressed at: [e-mail].

Uses of gzip:

  1. To compress a file:

	gzip file

     Produces file.gz

  2. To uncompress a file which has been compressed with gzip:

	gunzip file
      or
	gunzip file.gz

  3. To uncompress a file which has been compressed with UN*X
	compress:

	gunzip file.Z
      or
	cat file.old | gunzip > file.new

  4. To convert a file from UN*X compression to gzip compression:

	cat file.Z | gunzip | gzip > file.new

Further information on gzip and gunzip may be obtained by reading
the appropriate man pages, which are provided as part of the source
code.

Here is one of the gzip README files (from wuarchive.wustl.edu):
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Because the `compress' utility is covered by patents (US 4,464,650 and
4,558,302), we cannot use it; it is not free software.

Instead, the GNU Project uses the `gzip' program, which is free of known
software patents and also compresses better than `compress'.  Files
compressed with this method end with `.gz'.

Gzip can also uncompress files compressed with `compress' (i.e. files
ending in `.Z'), since the uncompression algorithm is not patented.

To extract sources that are in files ending in `.tar.gz' you can use the
command

      gzip -d < foo.tar.gz | tar xf -

where `foo.tar.gz' is the name of the file.

Gzip is available in source form on this ftp archive[wuarchive.wustl.edu],
in the file gzip-N.N.shar, gzip-N.N.tar, and gzip-N.N.tar.gz (the last for
people who already have gzip but want to get a newer version, since the
gzipped file will transfer faster).  Gzip is also available as a DOS
executable in the file gzip-N.N.msdos.exe. To find a VMS executable,
read gzip-vms.README.
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