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 openssh server ubuntu

5 Effective Tips to Harden SSH Server on Ubuntu

In this post I’m going to share 5 tips you can use to secure SSH on a public-facing Ubuntu server.…

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…