yes - output a string repeatedly until killed
yes [string...] yes {--help,--version}
This manual page documents the GNU version of yes. 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. OPTIONS When GNU false is invoked with exactly one argument, the following options are recognized: --help Print a usage message on standard output and exit successfully. --version Print version information on standard output then exit successfully.