[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] h command (sed)  H command (sed)  halt command      GRUB  hard disks     devices, designation as      naming conventions          under GRUB      parameters, setting (hdparm)      partitioning         cfdisk command          fdisk command  hash bang (#!)      tcsh shell  hash command     bash      ftp  hash mark (#)  2nd      in shell scripts      sed      tcsh shell  hashstat command (tcsh)  hdparm command  head command  Header keyword (RCS)  help     Emacs, invoking in  2nd  help command     bash      CVS      ex      ftp      GRUB  hexdump command  hide command     ex      GRUB  histchars variable (tcsh)  histdup variable (tcsh)  histfile variable (tcsh)  histlit variable (tcsh)  history command     bash      CVS      tcsh  history variable (tcsh)  HOME environment variable (tcsh)  home variable (tcsh)  host command  HOST environment variable (tcsh)  hostid command  hostname command  HOSTTYPE environment variable (tcsh)  HPATH environment variable (tcsh)  htdigest command  hup command (tcsh)  hwclock command  hyphen (-) and metamail command