====== Ubuntu - Certificates - Authorization Centre ======

<code bash>
cd  /etc/pki/tls/misc/
./CA -newca
./CA -newreq
./CA -sign
openssl rsa -in newkey.pem -out key.pem
</code>

  * certificate - newcert.pem; 
  * Key - key.pem; 
  * certification center to be installed in /etc/pki/CA/cacert.pem.