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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 LINUX

nodename

nodename(4)							   File Formats 						       nodename(4)

NAME

       nodename - local source for system name

SYNOPSIS

       /etc/nodename

DESCRIPTION

       When  a	machine is standalone or its IP address is configured locally, the /etc/nodename file contains the system name. By convention, the
       system name is the same as the hostname associated with the IP address of the primary network interface, for example, hostname.hme0.

       If the machine's network configuration is delivered by the RPC bootparams protocol, the /etc/nodename file is not used, as the system  name
       is delivered by the remote service.

       Given a system name value, regardless of source, the uname utility invoked with the -S option is used to set the system name of the running
       system.

       If the machine's network configuration is delivered by the DHCP protocol, the /etc/nodename file is used only if the DHCP server  does  not
       provide a value for the Hostname option (DHCP standard option code 12).

       A system name configured in /etc/nodename should be unique within the system's name service domain in order to ensure that any network ser-
       vices provided by the system will operate correctly.

       Given a system name value, regardless of source, the uname utility invoked with the -S option is used to set the system name of the running
       system.

EXAMPLES

       Example 1: Syntax

       The syntax for nodename consists of a single line containing the system's name. For example, for a system named myhost:

       myhost

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       nis+(1), uname(1), named(1M), ypbind(1M), attributes(5)

NOTES

       The nodename file is modified by Solaris installation and de-installation scripts.

SunOS 5.10							    9 Feb 2004							       nodename(4)
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