Summary
We have created, imported, and exported CA certificates, client and server certificates and keys, in addition to revocation lists with the tools xca and TinyCA2. We have seen that there are many features TinyCA2 offers that are neither in the scope of easy-rsa
nor available in xca. This is the reason why TinyCA2 is my favorite certificate management tool. However, all those tools use only the "toolbox" OpenSSL. If you want to read more and become a certificate professional, "man OpenSSL", then the website http://www.openssl.org is the place to go.