Chapter 4. System and
Software Installation
Chapter 4. System and
Software Installation
In order to install the Base
Operating System, you should first boot the system in the maintenance mode. The
Welcome to Base Operating System Installation and Maintenance screen is
displayed similar to Figure 17.
Figure 17: BOS Welcome Screen
Select 2 on this screen, and you will be shown a screen similar to
Figure 18.
Figure 18: Installation Settings
In the Installation and Settings screen, you can set the method of your installation, your language environments, and your preference regarding installing the Trusted Computing Base. Trusted Computing Base is to provide an extra level of security and ensures that whatever you are trying to run is actually run. If you set this attribute to YES, the install process will install the bos.rte.security fileset, and you can configure TCB. It is important to note that you can enable TCB only at this time. If you decide not to install TCB now, you will have to reinstall the operating system in order to enable TCB at a later stage. TCB can be removed by removing the bos.rte.security fileset from the system.
There are three ways in which you can install AIX on your system. These methods are as follows:
Generally, the New and Complete Overwrite method is used when:
| Note |
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The New and Complete Overwrite installation overwrites all data on the selected destination disk. This means that after the installation is complete, you will have to manually configure your system using the Configuration Assistant application, SMIT, or the command line. If you want to preserve your system configuration, and you do not need to completely overwrite your root volume group, do not use the New and Complete Overwrite option. |
Use this installation method to upgrade AIX Version 3.2, AIX Version 4.1, or AIX Version 4.2 to AIX Version 4.3 while preserving the existing root volume group. With the exception of /tmp, this method preserves all file systems including the root volume group, logical volumes, and system configuration files. Migration is the default installation method for AIX Version 3.2, AIX Version 4.1, and AIX Version 4.2 machines.
In most cases, the user configuration files from the previous version of a product are saved when the new version is installed during a Migration installation.
Use this installation method when a version of the BOS is installed on your system, and you want to preserve the user data in the root volume group. However, this method overwrites the /usr, /tmp, /var, and / (root) file systems by default; so, any user data in these directories is lost. These file systems are removed and recreated; so, any other LPPs or filesets that you installed on the system will also be lost. System configuration must be done after doing a Preservation installation.
The /etc/preserve.list file contains a list of system files to be copied and saved during a preservation BOS installation. The /etc/filesystems file is listed by default. You can add the full path names of any additional files that you want to save during the Preservation installation to the preserve.list file. For example, you can alter the /etc/preserve.list file to tell your installation process that you want to preserve your /var file system.
For detailed information on installing the BOS, refer to AIX Version 4.3 Installation Guide, SC23-4112.
Once you have installed the BOS, and the system has booted from the hard
disk, it will take you to the Installation Assistant menu.
A screen similar to Figure 19 is shown.
Figure 19: Installation Assistant Menu
You can do a number of tasks while you are in the Installation Assistant. If you need to call the Installation Assistant again, simply use the fast path smitty assist. All the changes that you make in the Install Assistant menu become available immediately. It is recommended that you make these changes when you are installing the operating system.
4.2 Understanding
Maintenance Levels