security

google authenticator secret key

How to Set Up SSH Two Factor Authentication on Ubuntu 18.04, 18.10 Server

This tutorial will show you how to set up SSH two factor authentication on Ubuntu 18.04/18.10 server using the well-known...

ubuntu 18.04 unattended upgrades email notification

Setting up Automatic Security Update (Unattended Upgrades) on Ubuntu 18.04

This tutorial is going to show you how to set up automatic security update, aka unattended upgrades, on Ubuntu 18.04....

ssh two factor authentication ubuntu

How to Set up SSH Two Factor Authentication on Ubuntu 16.04 with Google Authenticator

This tutorial will show you how to set up SSH two factor authentication on Ubuntu 16.04 server using the well-known...

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...

su command

Linux Security: Control access to the su command

By default, all users on a Linux distribution can use the su (switch user) command to become another user during...