The Virtualization Cookbook for SLES 10 SP2 - z/VM - IBM
The Virtualization Cookbook for SLES 10 SP2 - z/VM - IBM
The Virtualization Cookbook for SLES 10 SP2 - z/VM - IBM
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7.2.3 Configuring yum<br />
You will now configure yum so it can install RPMs from local install tree. To do so, per<strong>for</strong>m the<br />
following steps:<br />
► Create a file named rhel6.repo in the /etc/yum.repos.d directory:<br />
# cd /etc/yum.repos.d<br />
# vi rhel6.repo<br />
[RHEL6]<br />
name=Red Hat Enterprise Linux 6<br />
baseurl=file:///nfs/rhel6/Server<br />
► Import the RPM key which is included in the RHEL 6 DVD root directory:<br />
# cd /nfs/rhel6<br />
# rpm --import RPM-GPG-KEY-redhat-release<br />
Note: Red Hat signs each RPM with a private GPG key, which is compared to your public<br />
key each time a package is installed. This method ensures that the RPM is a genuine,<br />
unaltered package. When installing an RPM, if you ever see a message similar to:<br />
Header V3 DSA signature: NOKEY, key ID 897da07a<br />
Either the correct GPG key has not been imported, or the package itself has been altered.<br />
You are now ready to use yum to install or upgrade an RPM package. To install a package,<br />
use yum install . Yum will conveniently install the packages specified and<br />
automatically resolve dependencies <strong>for</strong> you. Note that you should not specify the package<br />
version on the command line, only the package name.<br />
7.2.4 Turning off unneeded services<br />
<strong>The</strong>re are a number of services which are started in a RHEL 6 minimum system. In order to<br />
keep the cloner as lean as possible, some of these can be turned off: To do so, per<strong>for</strong>m the<br />
following steps:<br />
► Turn off the following services with the chkconfig command:<br />
# chkconfig iptables off<br />
# chkconfig ip6tables off<br />
# chkconfig auditd off<br />
# chkconfig abrtd off<br />
# chkconfig atd off<br />
# chkconfig mdmonitor off<br />
Note: You should only disable the iptables service if you are on a trusted network.<br />
Otherwise, you will need to configure iptables to allow network traffic <strong>for</strong> the VNC server<br />
and NFS, as well as any other services that require network access.<br />
For more in<strong>for</strong>mation on configuring iptables <strong>for</strong> NFS traffic, see the article located at:<br />
http://www.redhat.com/magazine/0<strong>10</strong>aug05/departments/tips_tricks/<br />
Also, turning on and tuning a firewall is briefly discussed in section 11.1.3, “Turning on a<br />
firewall” on page 171.<br />
► You may choose to leave these services on, or turn others off. You can review which<br />
services are now configured to start in run level 3 with the following chkconfig command:<br />
Chapter 7. Installing RHEL 6 on the cloner 121
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