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Full Discussion: change hostname
Top Forums UNIX for Dummies Questions & Answers change hostname Post 30173 by RTM on Thursday 17th of October 2002 04:26:35 PM
Old 10-17-2002
From Sunsolve:

Solaris systems try to set their hostname through the "dhcpinfo" command
when they are booted as DHCP clients. The "dhcpinfo" command tries to
obtain the hostname for the client from a DHCP server by matching the
client's MAC address with a hostname entry in the DHCP server's network
client table. A Windows NT DHCP server usually does not have a network
client table since the hostname of a Windows client is stored locally.
Hence, a Solaris DHCP client will get no reply from the Windows NT DHCP
server to it's "dhcpinfo" command. If the Solaris client is configured
to use DHCP and the DHCP server fails to respond to the "dhcpinfo"
command, the client's hostname is set to "unknown" by the startup scripts.

We may work around this problem by making some modifications in the
system startup scripts as shown below:

1. For Solaris 2.6 and Solaris 7 Systems.

Edit the file /etc/init.d/rootusr and change the line that reads

hostname=`/sbin/dhcpinfo Hostname`

to

# hostname=`/sbin/dhcpinfo Hostname`
hostname=`shcat /etc/nodename`
uname -S $hostname

Save the file and reboot the system. The system's hostname will be the
entry in the file /etc/nodename.

2. For Solaris 8 systems.

Edit the file /etc/init.d/network and change the line that reads

"dhcp") hostname=`/sbin/dhcpinfo Hostname` ;;

to

# "dhcp") hostname=`/sbin/dhcpinfo Hostname` ;;
"dhcp") hostname=`shcat /etc/nodename` ;;

Then, edit the file /etc/init.d/inetsvc and change the line that reads

hostname=`/sbin/dhcpinfo Hostname`

to

# hostname=`/sbin/dhcpinfo Hostname`
hostname=`/usr/bin/cat /etc/nodename`

Save the files and reboot the system. The system's hostname will be the
entry in the file /etc/nodename.
 

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LEARN ABOUT PLAN9

dhcp

dhcp(5) 						Standards, Environments, and Macros						   dhcp(5)

NAME

       dhcp - Dynamic Host Configuration Protocol

DESCRIPTION

       Dynamic	Host Configuration Protocol (DHCP) enables host systems in a TCP/IP network to be configured automatically for the network as they
       boot. DHCP uses a client/server mechanism: servers store configuration information  for	clients,  and  provide	that  information  upon  a
       client's request. The information can include the client's IP address and information about network services available to the client.

       This manual page provides a brief summary of the Solaris DHCP implementation.

   Solaris DHCP Client
       The  Solaris  DHCP  client  is implemented as background daemon, dhcpagent(1M). This daemon is started automatically during bootup if there
       exists at least one dhcp.interface file in /etc. Only interfaces with a corresponding /etc/dhcp.interface file are automatically configured
       during  boot.  Network  parameters  needed for system configuration during bootup are extracted from the information recieved by the daemon
       through the use of the dhcpinfo(1) command. The daemon's default behavior can be altered by changing the tunables in the  /etc/default/dhc-
       pagent  file.  The  daemon is controlled by the ifconfig(1M) utility. Check the status of the daemon using the netstat(1M) and ifconfig(1M)
       commands.

   Solaris DHCP Server
       The Solaris DHCP server is implemented as a background daemon, in.dhcpd(1M). This daemon can deliver network configuration  information	to
       either  BOOTP  or  DHCP	clients.  The Solaris DHCP service can be managed using the dhcpmgr(1M) GUI or the command line utilities dhcpcon-
       fig(1M), dhtadm(1M), and pntadm(1M).

   DHCP Configuration Tables
       The Solaris DHCP server stores client configuration information in the following two types of tables:

       dhcptab tables	       Contain macros and options (also known as symbols), used to construct a package	of  configuration  information	to
			       send to each DHCP client. There exists only one dhcptab for the DHCP service. The dhcptab(4) can be viewed and mod-
			       ified using the dhtadm(1M) command or dhcpmgr(1M) graphical utility. See dhcptab(4) for more information about  the
			       syntax of dhcptab records. See dhcp_inittab(4) for more information about the DHCP options and symbols.

       DHCP network tables     DHCP  network  tables,  which  contain  mappings of client IDs to IP addresses and parameters associated with those
			       addresses. Network tables are named with the IP address of the network, and can be created,  viewed,  and  modified
			       using  the  pntadm  command  or	dhcpmgr  graphical utility. See dhcp_network(4) for more information about network
			       tables.

SEE ALSO

       dhcpinfo(1), dhcpagent(1M), dhcpconfig(1M), dhcpmgr(1M),  dhtadm(1M),  ifconfig(1M),  in.dhcpd(1M),  netstat(1M),  pntadm(1M),  syslog(3C),
       dhcp_network(4), dhcptab(4), dhcpsvc.conf(4), dhcp_inittab(4), dhcp_modules(5)

       Solaris DHCP Service Developer's Guide

       Alexander, S., and R. Droms. RFC 2132, DHCP Options and BOOTP Vendor Extensions.  Silicon Graphics, Inc. Bucknell University. March 1997.

       Droms, R. RFC 1534, Interoperation Between DHCP and BOOTP. Bucknell University. October 1993.

       Droms, R. RFC 2131, Dynamic Host Configuration  Protocol. Bucknell University. March 1997.

       Wimer, W. RFC 1542, Clarifications and Extensions for the Bootstrap Protocol. Carnegie Mellon University. October 1993.

SunOS 5.10							    13 Mar 2001 							   dhcp(5)
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