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gawk: Extracting

 B.1.2 Extracting the Distribution
 'gawk' is distributed as several 'tar' files compressed with different
 compression programs: 'gzip', 'bzip2', and 'xz'.  For simplicity, the
 rest of these instructions assume you are using the one compressed with
 the GNU Gzip program ('gzip').
    Once you have the distribution (e.g., 'gawk-4.2.0.tar.gz'), use
 'gzip' to expand the file and then use 'tar' to extract it.  You can use
 the following pipeline to produce the 'gawk' distribution:
      gzip -d -c gawk-4.2.0.tar.gz | tar -xvpf -
    On a system with GNU 'tar', you can let 'tar' do the decompression
 for you:
      tar -xvpzf gawk-4.2.0.tar.gz
 Extracting the archive creates a directory named 'gawk-4.2.0' in the
 current directory.
    The distribution file name is of the form 'gawk-V.R.P.tar.gz'.  The V
 represents the major version of 'gawk', the R represents the current
 release of version V, and the P represents a "patch level", meaning that
 minor bugs have been fixed in the release.  The current patch level is
 0, but when retrieving distributions, you should get the version with
 the highest version, release, and patch level.  (Note, however, that
 patch levels greater than or equal to 70 denote "beta" or nonproduction
 software; you might not want to retrieve such a version unless you don't
 mind experimenting.)  If you are not on a Unix or GNU/Linux system, you
 need to make other arrangements for getting and extracting the 'gawk'
 distribution.  You should consult a local expert.
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