man pages section 1: User Commands
    
Y
 
 yacc -- yet another compiler-compiler ( Index Term Link )
 
 yacc, create a tags file for use with ex and vi -- ctags ( Index Term Link )
 
 yes -- generate repetitive affirmative output ( Index Term Link )
 
 yes/no answer
  prompts for yes/no answer -- ckyorn ( Index Term Link )
  provides error message for yes/no answer -- erryorn ( Index Term Link )
  provides help message for yes/no answer -- helpyorn ( Index Term Link )
  validates yes/no answer -- valyorn ( Index Term Link )
 
 yet another compiler-compiler -- yacc ( Index Term Link )
 
 ypcat -- print values in a NIS database ( Index Term Link )
 
 ypmatch -- print the value of one or more keys from a NIS map ( Index Term Link )
 
 yppasswd -- change your network password in the NIS database ( Index Term Link )
 
 ypwhich -- return name of NIS server or map master ( Index Term Link )