coreutils: yes invocation
15.3 ‘yes’: Print a string until interrupted
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‘yes’ prints the command line arguments, separated by spaces and
followed by a newline, forever until it is killed. If no arguments are
given, it prints ‘y’ followed by a newline forever until killed.
Upon a write error, ‘yes’ exits with status ‘1’.
The only options are a lone ‘--help’ or ‘--version’. To output an
argument that begins with ‘-’, precede it with ‘--’, e.g., ‘yes --
--help’. ⇒Common options.