Due to (very) long-time bug in system-config-kickstart, the package selection section does not list available packages, one has to edit the ks.cfg: This question explains how.
An example given in the question is
%packages @ ubuntu-server openssh-server ftp build-essential
@ ubuntu-server is a package group. Where can I find this group name and other available package group names that can be added to the %packages section?
If I leave the %packages section completely blank, what gets installed? Nothing?