There are two types of Certificate Authorities (CA): Self Signed (Private) and Public CA (a root or an intermediate CA trusted publicly). In this blog post I will cover the creation of a CA on a VM with Linux and generate a wildcard certificate for a domain. This comes handy when you are doing proofs of concepts and you need a certificate for a webserver or a load balancer. In the process of generating a certificate there are two parties involved: an applicant and a CA.