Update a kickstart installation in the %post section

Add this to the %post section of your kickstart file:

# Update server from RHN
rpm –import /usr/share/rhn/RPM-GPG-KEY
rhnreg_ks –force –profilename ${HOSTNAME:-“tmp-host-name.mydomain.com”} –username myrhnuser
–password myrhnpasswd
up2date –nox –force –update -v