When you connect an external USB drive or flash drive to your machine, the Linux system will automatically mount its file system for the appropriate user. However, this automatic mount may fail for some reason and you will get a small window with an "Not authorized to perform operation" error message.

In this tutorial, we will install Let's Encrypt Certbot on an ISPConfig3 server environment. Once the installation is complete, our system is ready to obtain and automatically configure and renew free SSL certificates for server-managed domain names so that any web site we manage can be operated over the secure HTTPS protocol with a few clicks.

This tutorial describes how to create, modify, or delete users and passwords in .htaccess files for basic HTTP authentication

In this tutorial, let's look at how to use a self-generated public key to log from another command line to another machine via SSH without using a password.