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gawk: Invoking Gawk

 2 Running 'awk' and 'gawk'
 This major node covers how to run 'awk', both POSIX-standard and
 'gawk'-specific command-line options, and what 'awk' and 'gawk' do with
 nonoption arguments.  It then proceeds to cover how 'gawk' searches for
 source files, reading standard input along with other files, 'gawk''s
 environment variables, 'gawk''s exit status, using include files, and
 obsolete and undocumented options and/or features.
    Many of the options and features described here are discussed in more
 detail later in the Info file; feel free to skip over things in this
 major node that don't interest you right now.


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