I installed Cubic today on my Lubuntu 16.04 machine (on a partition, 3,5 GB free by the time of writing, on Cubic installation time the free space was about 4,2 GB) and when I selected the ISO (downloaded from official Lubuntu website, if you wonder) on Cubic in order to customize it, it just loaded the directory and the file name (lubuntu-16.04-desktop-i386.iso).
(Notice that there is no other information, neither Cubic lets me edit info in the "Custom ISO" area, nor lets me click on "Next".)
I think that I have to extend the partition because on the guide here, on one picture, the compressed Linux file system used 3,99 GB of space, and the final ISO image used 1,21 GB (5,2 GB in total).
So, is there a website like SUSE Studio or a Windows app in order to create custom Ubuntu ISOs?
Any help is appreciated.
Thanks in advance,
Bajiru