security

ssh two factor authentication ubuntu

Set Up SSH Two-Factor Authentication (2FA) on Debian 11 Server

This tutorial will show you how to set up SSH two-factor authentication on Debian server using the well-known Google Authenticator.…

ssh two factor authentication ubuntu

Set Up SSH Two-Factor Authentication (2FA) on Ubuntu 22.04/20.04 Server

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

Set Up Automatic Security Update on ubuntu

Set Up Automatic Security Update (Unattended Upgrades) on Ubuntu

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

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…