32.7. Post-installation Script
You have the option of adding commands to run on the system once the installation is complete. This section must be placed towards the end of the kickstart file, after the kickstart commands described in Section 32.4, “Kickstart Options”, and must start with the
%postcommand and end with the
%endcommand. If your kickstart file also includes a
%presection, the order of the
%postsections does not matter. See Section 32.8, “Kickstart Examples” for example configuration files.
This section is useful for functions such as installing additional software and configuring an additional nameserver.
If you configured the network with static IP information, including a nameserver, you can access the network and resolve IP addresses in the
%postsection. If you configured the network for DHCP, the
/etc/resolv.conffile has not been completed when the installation executes the
%postsection. 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
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.
- Allows you to specify commands that you would like to run outside of the chroot environment.The following example copies the file
/etc/resolv.confto the file system that was just installed.
%post --nochroot cp /etc/resolv.conf /mnt/sysimage/etc/resolv.conf
- Allows you to specify a different scripting language, such as Python. Replace /usr/bin/python with the scripting language of your choice.
- Logs the output of the post-install script. Note that the path of the log file must take into account whether or not you use the
--nochrootoption. For example, without
%post --nochroot --log=/mnt/sysimage/root/ks-post.log