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1.7. 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.confto the file system that was just installed.Copy to Clipboard Copied! Toggle word wrap Toggle overflow %post --nochroot cp /etc/resolv.conf /mnt/sysimage/etc/resolv.conf
%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.
1.7.1. Examples
Turn services on and off:
/sbin/chkconfig --level 345 telnet off /sbin/chkconfig --level 345 finger off /sbin/chkconfig --level 345 lpd off /sbin/chkconfig --level 345 httpd on
/sbin/chkconfig --level 345 telnet off /sbin/chkconfig --level 345 finger off /sbin/chkconfig --level 345 lpd off /sbin/chkconfig --level 345 httpd on
Run a script named
runme from an NFS share:
mkdir /mnt/temp mount -o nolock 10.10.0.2:/usr/new-machines /mnt/temp open -s -w -- /mnt/temp/runme umount /mnt/temp
mkdir /mnt/temp mount -o nolock 10.10.0.2:/usr/new-machines /mnt/temp open -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.
Add a user to the system:
/usr/sbin/useradd bob /usr/bin/chfn -f "Bob Smith" bob /usr/sbin/usermod -p 'kjdf$04930FTH/ ' bob
/usr/sbin/useradd bob /usr/bin/chfn -f "Bob Smith" bob /usr/sbin/usermod -p 'kjdf$04930FTH/ ' bob 
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