Oracle Application Server 10g, Installation Manual

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The /etc/hosts File
Requirements 2-21
2.9 The /etc/hosts File
Although the contents of the
/etc/hosts
file affect these items:
■
Section 2.9.1, "Location of the Default Oracle Identity Management Realm"
■
Section 2.9.2, "Hostname for OracleAS Single Sign-On"
the installer provides alternative methods for you to enter the values that you want
without editing the
hosts
file. See the following subsections for details.
2.9.1 Location of the Default Oracle Identity Management Realm
The installer reads the
hosts
file to construct the location of the default Oracle
Identity Management realm. It displays this location in the "Specify Namespace in
Internet Directory" screen.
The
hosts
file should use the following format:
ip_address fully_qualified_hostname short_hostname
Example:
123.45.67.89 primaryHost.mydomain.com primaryHost
In the preceding example, the location of the default Oracle Identity Management
realm would look like "
dc=mydomain,dc=com
".
If the file uses a different format, the installer displays an incorrect value in the screen.
For example, if the
hosts
file contains:
123.45.67.89 primaryHost primaryHost.mydomain.com <--- incorrect format
the installer would display "
dc=primaryHost,dc=com
" as the default Oracle
Identity Management realm. This is probably not the value that you want for the
default Oracle Identity Management realm.
2.9.2 Hostname for OracleAS Single Sign-On
If you are installing OracleAS Single Sign-On, and your
hosts
file contains only the
hostname of your computer, without the domain name, then you will only be able to
sign on to the Single Sign-On server using the hostname by itself (without the domain
name).
If you want to require a domain name when connecting to the Single Sign-On server,
you can edit the
hosts
file to include the domain name. If you do not want to edit the
file, you can use the
OUI_HOSTNAME
command-line parameter to the installer to
override the value in
hosts
. For example:
prompt> mount_point /1014disk1/runInstaller OUI_HOSTNAME=myserver.mydomain.com
Tip:
If you need the
hosts
file to use a different format, you can
edit the file to use the required format, perform the installation,
then revert the file back to its original format after installation.
If you are unable, or unwilling, to edit the
hosts
file, you can enter
the desired value for the default Oracle Identity Management realm
in the Custom Namespace field on the "Specify Namespace in
Internet Directory" screen.