[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Y] [Z] y command (sed)  yacc command  yank command     Emacs      ex  yes command  ypbind command  ypcat command  ypchfn command  ypinit command  2nd  ypmatch command  yppasswd command  yppasswdd command  yppoll command  yppush command  2nd  ypserv command  ypset command  yptest command  ypwhich command  ypxfr command