What (CPU, RAM, storage) are you using for your lab?

If you're unable to obtain a license key from the GitHub repository, consider the following alternative options:

Search queries for "ESXi 5.5 license key GitHub exclusive" often lead to repositories containing lists of generic license keys or automated scripts (like those utilizing Python or Bash) designed to bypass evaluation periods.

A powerful, open-source alternative based on Debian Linux that includes built-in backup tools and clustering features without licensing fees.

VMware does provide a legitimate free license key for ESXi 5.5, but it must be obtained directly from VMware’s official website. The free “vSphere Hypervisor” license is available through VMware Customer Connect at the dedicated evaluation center. This official free key: