Security

pgp signature

How to Verify PGP Signature of Downloaded Software on Linux

PGP, which stands for Pretty Good Privacy, is a public key cryptography software. PGP can be used to encrypt and...

tls certificate

Why You Should Use WebRoot Plugin to Obtain Let’s Encrypt TLS Certificate

For those who don’t know Let’s Encrypt, it’s a free, automated (to some extent) and open certificate authority that issues...

wp vulnerability scanner

Install and Use WPScan on Linux – A WordPress Vulnerability Scanner

WPScan is a command line wp vulnerability scanner that can be used to scan WordPress vulnerabilities. It comes pre-installed on the...

harden ssh server

5 Tips to Harden SSH Server

In this tutorial, we will be looking at securing SSH server from unauthorized access. SSH is the primary way to...

port knocking

Secure SSH Service Using Port Knocking on Debian and Ubuntu

In this tutorial, I’m going to show you how to use port knocking to secure SSH service on Debian and...

public key

A Practical Guide to GPG – Part 3 Working with Public Key

In part 2 of this GPG tutorial series, you learned how to encrypt message with public key and decrypt message...

Digital Signature

A Practical Guide to GPG – Part 4 Digital Signature

Previous 3 parts of this GPG tutorial series covered GPG encryption. In this part, we will take a look at...

GPG Guide

A Practical GPG Guide – Part 2 Encrypt and Decrypt Message

This is part 2 of my tutorials on GPG. In part 1, you generated your public/private keypair and a revocation...

GPG

A Practical Guide to GPG – Part 1 Generate Your Keypair

This tutorial series will teach you how to use GPG in Linux terminal. I will not tell you a bunch...

HSTS

What Is HSTS and How To Enable It on Nginx

What is HSTS HSTS stands for HTTP Strict Transport Security. HSTS tells web browsers that they should always interact with...

ssl/tls handshak explained

SSL/TLS Handshake Explained With Wireshark Screenshot

An encrypted connection is established betwen the browser or other client with the server through a series of handshakes. In...