Securing VPS/Servers

Introduction to FirewallD on CentOS FirewallD is frontend controller for iptables used to implement persistent network traffic rules. It provides...

Obtain a Commercially Signed TLS Certificate If you intend to host a publicly accessible website which will use HTTPS, then...

How to Upgrade to Ubuntu 16.04 LTS Ubuntu 16.04 is a Long-Term Support (LTS) release that will be supported by...

Upgrading Bash for the Shellshock Vulnerability Shellshock, or Bashdoor, is a vulnerability that was discovered on September 12th, 2014 and...

Protecting Your Linode with TCP Wrappers TCP wrappers are a host-based access control system. They are used to prevent unauthorized...

Full Disk Encryption Deprecated This guide has been deprecated and is no longer being maintained. Full disk encryption protects the...

Using rdiff-backup with SSHFS Rdiff-backup is an open source backup system that performs incremental, differential backups on a wide variety...

Use One-Time Passwords for Two-Factor Authentication with SSH on Ubuntu 16.04 and Debian 8 In this guide, you’ll learn how...

Install Let's Encrypt to Create SSL Certificates Let’s Encrypt is an SSL certificate authority managed by the Internet Security Research...

Upgrading to Debian 8 (Jessie) Debian 8 (Jessie) is the most recent version of Debian, released in April 2015. This...