CA is a trusted source that can verify the authenticity of the certificate, and provide assurance that the certificate is really owned by the organization or individual that claims to own it.
openssl library provides all needed for this task. Install it:
apt-get install openssl
Once you have entered and re-entered your password, CA.plwill collect some information from you about your organization.
If we enter the pass phrase correctly, CA.plwill generate our new certificate and display its contents on the screen.
Using configuration from /usr/lib/ssl/openssl.cnf