This is an old and unmaintained virtual appliance for managing TLXOS devices. tlxadm-vmw_vbx_kvm-7.8.8.zip is for VMware Workstation/ESX[i], Oracle VirtualBox and Linux KVM. tlxadm-xen_hv-7.8.8.zip is for Xen-based hypervisors such as Citrix XenServer and XCP/XCP-NG, and Microsoft Hyper-V. For maximum compatibility with old virtualization software, the template is based on OVF 0.9 rather than OVF >= 1.0, and as such you will not be able to import it using vCenter 6.5.0 or later (which dropped support for OVF < 1.0). You can still install it using VMware ESX[i]'s host UI, but this function will be disabled while the hypervisor is joined to a vCenter server, so you may temporarily need to remove the host from vSphere in order to do this. The version of TMS provided on this virtual appliance is very old, but you can easily update it by opening a root shell and entering a command like "rpm -Uvh http://mirrors.thinlinx.com/downloads/TMS-8.2.3-1.el7.centos.x86_64.rpm" (adjust filename as required, use the "el7" version of the relevant RPM). There are several known bugs when using the old TLXADM appliance for session shadowing: - /home/tlx/.ssh has incorrect permissions (rwxrwxr-x) and sshd refuses to have anything to do with its contents. If you chmod /home/tlx/.ssh to 0700 it will subsequently work, subject to the limitation below. - /home/tlx/.ssh/authorized_keys only includes the [I]SFF/RePC keys. RPi and its variants have different key pairs than [I]SFF and RePC, which was a deliberate decision on our part because at the time we were concerned about wider availability via NOOBS and the unlicensed VTOS and RPi MC variants. - "vncviewer -listen" quits after a single connection. This does not happen on the even older CentOS 6 appliance, which is running the same software (TigerVNC) at a lower version (1.1.0), so behavior is different in the newer version (1.3.1) for some reason (bug?).