$  SHOW ROOT
  DISK$ALPHASYS:[000000]
  $  SET ROOT DISK$ALPHASYS:[PSX$ROOT]
  %SET-I_SXROOSET, system POSIX root set to DISK$ALPHASYS:[PSX$ROOT]
  $ SHOW ROOT
  DISK$ALPHASYS:[PSX$ROOT]
  $

      The SHOW ROOT command in this example displays the current root
      path. The SET ROOT command changes these defaults, and the next
      SHOW ROOT command displays the new default root.