dmu(8)							      System Manager's Manual							    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 maintains 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 cannot 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 system 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 continues 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 cannot 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

       Base directory for Dataless Management Services Default location of client's root directory 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

																	    dmu(8)