Follow Techotopia on Twitter

On-line Guides
All Guides
eBook Store
iOS / Android
Linux for Beginners
Office Productivity
Linux Installation
Linux Security
Linux Utilities
Linux Virtualization
Linux Kernel
System/Network Admin
Programming
Scripting Languages
Development Tools
Web Development
GUI Toolkits/Desktop
Databases
Mail Systems
openSolaris
Eclipse Documentation
Techotopia.com
Virtuatopia.com
Answertopia.com

How To Guides
Virtualization
General System Admin
Linux Security
Linux Filesystems
Web Servers
Graphics & Desktop
PC Hardware
Windows
Problem Solutions
Privacy Policy

  




 

 

Red Hat Enterprise Linux 9 Essentials Book now available.

Purchase a copy of Red Hat Enterprise Linux 9 (RHEL 9) Essentials

Red Hat Enterprise Linux 9 Essentials Print and eBook (PDF) editions contain 34 chapters and 298 pages

Preview Book

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 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.
--log /path/to/logfile
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 --nochroot option. For example, without --nochroot:
%post --log=/root/ks-post.log
with --nochroot:
%post --nochroot --log=/mnt/sysimage/root/ks-post.log

32.7.1. Examples

Register the system to a Red Hat Network Satellite and log the output:
%post --log=/root/ks-post.log
wget -O- https://proxy-or-sat.example.com/pub/bootstrap_script | /bin/bash
/usr/sbin/rhnreg_ks --activationkey=<activationkey>
Run a script named runme from an NFS share:
mkdir /mnt/temp 
mount -o nolock 10.10.0.2:/usr/new-machines /mnt/temp 
openvt -s -w -- /mnt/temp/runme 
umount /mnt/temp

Note

NFS file locking is not supported while in kickstart mode, therefore -o nolock is required when mounting an NFS mount.

 
 
  Published under the terms of the Creative Commons License Design by Interspire