Red Hat ENTERPRISE LINUX WS 2.1 - Guida di Installazione Scaricare il pdf (Pagina 138)

138 Network configuration

DONE

INDEX

• be sure that there are the following entries:

If one of them is missing click New → Add and create it

•click File → Save

•click File → Quit

10.8 Nameserver configuration

In case there are some problems with the network, e.g. the name server is not avail-

able, everything on the desktop seems not to react anymore. In fact any activity

takes a very long time.

The reason for this could be that DNS resolver does not work anymore due to net-

work problems. To check this press the buttons Ctrl-Alt-F1, login as root and enter

the command host <ENTER_NAME_OF_YOUR_PC>. If the answer is some-

thing like:

;;connection timed out no servers could be reached

the PC has lost the name server connection.

To make sure that the PC will not as easily run again into such trouble enable cach-

ing name services. ‚nscd‘ is the necessary package is which is typically installed.

To enable nscd do the following:

1. Open a Linux shell

2. Type in su - to become superuser

3. Enter the command: chkconfig nscd on

If this does not work you have to install the nscd package, this can be done either

with the command up2date nscd or by installing it from the Red Hat CD. For more

details about installing packages see chapter 9.3.

After installing the package you should configure the caching delay. For this edit

IP Name Nickname

149.236.99.1 ASP_ST2 <whatever>

149.236.99.99 spect <whatever>

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Red Hat ENTERPRISE LINUX WS 2.1 - Guida di Installazione Pagina 138