Index for Section 8

Alphabetical listing for D

dmu(8)
NAME
  dmu -	 dataless management utility

SYNOPSIS
  /usr/sbin/dmu

DESCRIPTION
  dmu is the utility which is used to manage Dataless Management Services
  (DMS) environments and clients.

  In a dataless management environment, a server system maintains the root,
  /usr, and /var file systems for client systems.  All swapping and dumping
  is done on the client's local disk.

  The dataless management utility (dmu) creates a root file system based on
  the software subsets installed in the DMS environment area on the server.
  This root file system is accessed by client systems over a Local Area
  Network (LAN).  DMS lets system administrators customize the root file
  systems prior to client systems access.

  The server has a reserved disk area (known as the DMS area) on which copies
  of the /usr filesystem resides.  The /usr filesystem is shared among client
  systems and is mounted with read only access for clients.  The server also
  maintains multiple copies of the root area, one for each client. Each copy
  of root resides in a client root directory in the DMS area and is
  customized for the client to provide for differences between environmental
  requirements.	 The server's DMS root and /usr areas are made available to
  clients by means of a network file system (NFS).  The client accesses the
  DMS disk area through a LAN connection with the server.  Each client is
  booted across the network from it's private root area on the server.	Once
  booted, the client continues to use it's root files and usr files from the
  server's DMS area.

  One or more DMS environments can reside in a DMS area.  Each DMS
  environment contains one or more root areas; a root area exists for each
  general type of client to be supported.  Client root areas reside in the
  /var/adm/dms directory.  Client root areas have names of the format
  /var/adm/dms/dmsn.alpha, where n is a sequentially-assigned number
  beginning with 0 and alpha is a name identifying the client's machine
  architecture.	 The first DMS area for Alpha AXP clients would be named
  /var/adm/dms/dms0.alpha.

  A DMS client area, called /clients.  Multiple copies of the root area are
  in the /clients area, each tailored from the appropriate generic root for
  an individual client system.	Each client's root area contains a customized
  kernel to support that client's actual system configuration (including
  central processor, system memory, and peripheral devices).

  Each client computer sees its private root area and the shared /usr area
  from the appropriate /var/adm/dms environment as local although these areas
  are actually on the server and accessed through NFS.	As with the
  /var/adm/dms area, multiple client areas can be established in different
  partitions.

  After the /var/adm/dms/dmsn.alpha and clients areas are created in the DMS
  area, the Install Software option of dmu is used to install software into
  the /var/adm/dms/dmsn.alpha file system.  All software must be installed
  and configured in the DMS server area before clients can be added to the
  environment.	The setld utility can be used to install additional software
  at a later date if necessary.

  Before dmu can be used to serve a client, the client must be registered
  with a network naming service (such as BIND or NIS) or an entry must be
  made in the /etc/hosts file on the DMS server.  The following information
  must be known to register the client:

   1.  The client's host name

   2.  The /var/adm/dms/dmsn.alpha environment to which the client will be
       registered.

   3.  The location of the client's root directory.  The path must be located
       under /clients and should not exceed 25 characters.

   4.  The client's network interface, subnet mask, and default route for
       this network interface.

   5.  The client's Ethernet or FDDI hardware address.

   6.  The swap device and partition and swap device type

   7.  The type of kernel build support to be provided for the client

  User's must have superuser privileges to invoke the dmu utility.  The dmu
  utility allows the server's system administrator to perform the following
  functions:

  a - ADD a client to an environment

  c - CONFIGURE software environments

  d - DELETE software environments

  i - INSTALL software environments

  l - LIST registered clients

  m - MODIFY a client

  r - REMOVE a client

  s - SHOW software environments

RESTRICTIONS
  Tru64 UNIX servers cannot install the base operating system on clients that
  do not support the bootp network bootstrapping protocol.

EXAMPLES
  The following command invokes the dmu utility from the root system prompt
  on the server:

       # /usr/sbin/dmu


  The DMU Main menu appears from which users can select dmu functions.

       *** DMU Main Menu ***

	   a) ADD a client
	   c) CONFIGURE software environments
	   d) DELETE software environments
	   i) INSTALL software environments
	   l) LIST registered clients
	   m) MODIFY a client
	   r) REMOVE a client
	   s) SHOW software environments
	   x) EXIT

FILES
  /var/adm/dms			  Base directory for Dataless Management
				  Services

  /clients/hostname		  Default location of clients root directory

  /var/adm/dms/clients/dmsdb	  DMS client database file

RELATED INFORMATION
  Commands: setld(8), doconfig(8), pmerge(8), nissetup(8), bindsetup(8).

  Files: bootptab(4).

  Sharing Software on a Local Area Network
  Installation Guide