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124 Network configuration

DONE

INDEX

10.2 Changing the hostname of the PC

The hostname of the PC is defined within the network configuration. Because

there are different possibilities how to set up a network correctly (DHCP, fix IP

address or no network connection) there is no general description on how to

change the hostname.

If you want to change the hostname just follow the instructions given in the chap-

ters 10.4 - 10.6.

Changing the hostname may has an effect on programs. For the Bruker BioSpin

software you might have to check these two places:

1. In case the PC is a license server the name of the PC is stored in the license.dat

file that is stored in the flexlm installation directory. In a default installation this

is:

/usr/local/flexlm/Bruker/licenses/license.dat

If this PC acts as a license server and you changed the license file, you have to

be sure that the respective file is changed in the same way on all license clients.

2. The user specific configuration is stored in the directory:

<USER_HOME>/.topspin-<PC_NAME>

To keep the individual T

OPSPIN configuration in case the computer name was

changed, rename these directories.

10.3 Some useful commands

There are two commands that allows to easily check if network is set up correctly:

hostname and hostname -f

hostname has to show the short name of the PC, e.g. nmrpc and

hostname -f has to show the full qualified name e.g. nmrpc.chemistry.uni-

versity.com. If the answers are not as described, something is wrong with your

network configuration. Because the Linux system reacts very sensitive on wrong

network configuration, you might get several problems, e.g. T

OPSPIN does not

start, spectrometer will not boot, the T

OPSPIN license can not checked out etc..

A convenient command for checking the functionality of the ethernet cards is

/sbin/mii-tool

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Red Hat ENTERPRISE LINUX WS 2.1 - Guida di Installazione Pagina 124