He he he, I had to install zOS a few years ago.. You think fixing a defect on zvm&#x2F;zlinux is a PITA, just try installing zOS. Ugh, make me shiver thinking about it.<p>Apparently, just cloning a working system and applying PTF&#x27;s is the common method of doing it. Otherwise you can pay IBM to build an image and install it (can&#x27;t remember what they call it) but basically they generally install it the same way.