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gzip: Environment

 
 5 Environment
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 The obsolescent environment variable ‘GZIP’ can hold a set of default
 options for ‘gzip’.  These options are interpreted first and can be
 overwritten by explicit command line parameters.  As this can cause
 problems when using scripts, this feature is supported only for options
 that are reasonably likely to not cause too much harm, and ‘gzip’ warns
 if it is used.  This feature will be removed in a future release of
 ‘gzip’.
 
    You can use an alias or script instead.  For example, if ‘gzip’ is in
 the directory ‘/usr/bin’ you can prepend ‘$HOME/bin’ to your ‘PATH’ and
 create an executable script ‘$HOME/bin/gzip’ containing the following:
 
      #! /bin/sh
      export PATH=/usr/bin
      exec gzip -9 "$@"
 

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