A W3Techs survey from May 2018 shows that IdenTrust, a cross-signer of Let's Encrypt intermediates, has risen to be the most popular SSL certificate authority, while Symantec has dropped out of the chart, due to its security services being acquired by DigiCert:
Tutorial: Configure Apache Web Server on Amazon Linux 2 to Use SSL/TLS Secure Sockets Layer/Transport Layer Security (SSL/TLS) creates an encrypted channel between a web server and web client that protects data in transit from being eavesdropped on.
This is a beginner’s tutorial on SSL certificates (which by now should be called TLS certificates, but old habits die hard). I’ll cover both how they function, and how to create a SSl/TLS certificate using OpenSSL, either self-signed or signed by a CA.
One time only: If the X login screen is running and you just want to connect to it once (i.e. a one-shot): It is usually possible to do this by just adjusting the XAUTHORITY environment variable to point to the correct MIT-COOKIE auth file while running x11vnc as root, e.g. for the gnome display manager, GDM:
Abstract. This document defines the Web Services Architecture. It identifies the functional components and defines the relationships among those components to effect the desired properties of the overall architecture.