Cannot import Ubuntu OS under 'Install Linux/ESX OS' to install ubuntu onto target using Scripted OS install procedures
Release: 8.5 and 8.6
Ubuntu is not supported using 'Install Linux/ESX OS' at this time
Only supports:
ESXi 4, 5 & 5.1
And RPM based Linux OSes: Redhat, Suse, CentOS
At this time Ubuntu OS is not supported to perform a scripted OS install