yes - phpMan

File: coreutils.info,  Node: yes invocation,  Prev: printf invocation,  Up: Printing text
15.3 'yes': Print a string until interrupted
============================================
'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'.  *Note Common options::.