Post-Installation Script - Red Hat ENTREPRISE LINUX 5 Installation Manual

Chapter 31. Kickstart Installations
echo ­"part ­/home ­­­fstype ext3 ­­­size 2048 ­­­grow" >> ­/tmp/part­include
fi
This script determines the number of hard drives in the system and writes a text file with a different
partitioning scheme depending on whether it has one or two drives. Instead of having a set of
partitioning commands in the kickstart file, include the line:
%include ­/tmp/part­include
The partitioning commands selected in the script are used.
Note
The pre-installation script section of kickstart cannot manage multiple install trees or
source media. This information must be included for each created ks.cfg file, as the pre-
installation script occurs during the second stage of the installation process.

31.7. Post-installation Script

You have the option of adding commands to run on the system once the installation is complete. This
section must be at the end of the kickstart file and must start with the %post command. This section is
useful for functions such as installing additional software and configuring an additional nameserver.
Note
If you configured the network with static IP information, including a nameserver, you can
access the network and resolve IP addresses in the %post section. If you configured
the network for DHCP, the /etc/resolv.conf file has not been completed when the
installation executes the %post section. You can access the network, but you can not
resolve IP addresses. Thus, if you are using DHCP, you must specify IP addresses in the
%post section.
Note
The post-install script is run in a chroot environment; therefore, performing tasks such as
copying scripts or RPMs from the installation media do not work.
--nochroot
Allows you to specify commands that you would like to run outside of the chroot environment.
The following example copies the file /etc/resolv.conf to the file system that was just
installed.
%post ­­­nochroot cp ­/etc/resolv.conf ­/mnt/sysimage/etc/resolv.conf
--interpreter /usr/bin/python
Allows you to specify a different scripting language, such as Python. Replace /usr/bin/python
with the scripting language of your choice.
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