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dmu(8)								       dmu(8)



NAME

  dmu -	Dataless management utility

SYNOPSIS

  /usr/sbin/dmu

DESCRIPTION

  The dataless management utility (dmu)	manages	Dataless Management Services
  (DMS)	environments and clients, letting you install, configure, and list
  DMS environments, and	add, list, modify, or remove DMS clients. DMS main-
  tains	root (/), /usr,	and /var file systems on a DMS server for DMS
  clients. All swapping	and dumping is done on the DMS client's	local disk.

  The dmu utility 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 DMS clients over a Local Area Network (LAN). DMS lets system
  administrators customize the root file systems before	it is accessed by DMS
  clients.

				    Caution

       DMS is not supported in a clusters environment. A cluster member	can-
       not be a	DMS server or a	dataless client.

  Dataless Management Services


  The DMS server maintains a separate copy of the root file system for each
  DMS client in	a client root directory	(usually /clients) in the DMS area.
  Each DMS root	area is	customized for the DMS client to allow for different
  environmental	requirements.

  The DMS server also reserves a DMS area where	copies of the /usr file	sys-
  tem reside. The /usr file system is shared by	DMS clients with read-only
  access.

  The server's DMS root	and /usr areas are available to	DMS clients through a
  network file system (NFS), with each client accessing	the DMS	disk area on
  the DMS server over a	LAN. Each DMS client is	booted over the	network	from
  its private root area	on the DMS server. Once	booted,	the DMS	client con-
  tinues to use	its root files and /usr	files from the server's	DMS area.

  DMS Environments


  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 DMS client	supported. DMS client root areas reside	in the /var/adm/dms
  directory, and are named /var/adm/dms/dmsN.arch, where N is a
  sequentially-assigned	integer	starting with 0	and arch is a name
  identifying the client's machine architecture, such as alpha.	The first DMS
  area for Alpha clients would be named	/var/adm/dms/dms0.alpha.





  DMS Client Areas


  DMS maintains	a DMS client area in the /clients directory.  Each root	area
  for an individual DMS	client is tailored from	the appropriate	generic	root
  file system, and contains a customized kernel	to support that	DMS client's
  actual system	configuration.

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

  DMS Software Installation


  Use the dmu utility's	Install	Software option	to install software into each
  /var/adm/dms/dmsN.arch file system.  All software must be installed and
  configured in	the DMS	server area before DMS clients can be added to the
  DMS environment.

  DMS Client Registration


  Before you use the dmu utility to serve a DMS	client,	you must register the
  DMS client for a DMS area or make an entry for the DMS client	in the
  /etc/hosts file on the DMS server. You must have the following information
  to register a	DMS client:

    +  The client's host name.

    +  The /var/adm/dms/dmsN.arch DMS environment where	the DMS	client will
       be registered.

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

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

    +  The DMS client's	hardware network address.

    +  The gateway address between the DMS client and server.

    +  The swap	device and partition and swap device type.

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

RESTRICTIONS

  You must log in as root or have superuser privileges to invoke the dmu
  utility.

  Tru64	UNIX DMS servers do not	support	dataless environments on DMS clients
  that do not support the BOOTP	Internet Boot Protocol.

  DMS is not supported in a clusters environment. A cluster member cannot be
  a DMS	server or a dataless client.


EXAMPLES

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

       # /usr/sbin/dmu

  You see the DMU Main Menu, and you can select	dmu functions.

       *** DMU Main Menu ***

       Choices without key letters are not available.

	   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

       Enter your choice:

  Available menu options depend	upon previous actions. For example, you	can-
  not list, modify, or remove clients until you	have added at least one	DMS
  client. In that case,	the m, l, and r	key letters are	not shown in front of
  their	respective options:

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


FILES

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

  /clients/hostname
      Default location of client's root	directory

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

SEE ALSO

  Commands: bindsetup(8), doconfig(8), nissetup(8), pmerge(8), setld(8)

  Files: bootptab(4)

  Sharing Software on a	Local Area Network

  Installation Guide

  Installation Guide --	Advanced Topics