HALTSYS(ADM)                         UNIX System V



     Name
          haltsys, reboot - closes out the file systems and shuts down
          the system


     Syntax
          /etc/haltsys [ -d ]
          /etc/reboot


     Description
          The haltsys utility performs a  uadmin()  system  call  (see
          uadmin(S))  to  flush  out  pending  disk I/O, mark the file
          systems clean, and halt the processor.  haltsys takes effect
          immediately,  so user processes should be killed beforehand.
          shutdown(ADM) is recommended  for  normal  system  shutdown,
          since  it  warns  users,  terminates  processes,  then calls
          haltsys.  Use  haltsys  directly  only  if  you  cannot  run
          shutdown; for example, because of some system problem.

          haltsys displays a prompt indicating  that  the  system  has
          been  shut down and can be rebooted or powered down.  If the
          -d option is used, the system will remain down and  you  are
          not given the option to reboot.

          The reboot command performs the same  function  as  haltsys,
          except the system is rebooted automatically afterwards.

          Only the super-user can execute haltsys or reboot.


     Notes
          haltsys locks hard disk heads.


     See Also
          shutdn(S), uadmin(S), shutdown(ADM)

          reboot  was  developed  at  the  University  of  California,
          Berkeley, and is used with permission.


     Value Added
          haltsys and reboot are extensions of AT&T System V  provided
          by the Santa Cruz Operation.


     (printed 2/15/90)                               HALTSYS(ADM)