yes - an endless stream of the same word
yes [answer]
yes | script # Answer yes to all questions from the script
Yes sends out an endless stream of y's, each on one line. One uses it to
automatically say "yes" to all questions a command may ask. This is
useful for commands that ask too many "Are you sure?" questions. The
optional argument makes yes use answer as the word to print instead of a
single y character.