Ubuntu

• https://www.microsoft.com/de-de/evalcenter/evaluate-windows-server-2012-r2
• https://opnsense.org/download/

• https://ubuntu.com/pro
• https://cloud.google.com/compute/docs/images/premium/ubuntu-pro-faq?hl=de#can_i_migrate_my_ubuntu_lts_vm_to_ubuntu_pro