Ubuntu Linux Guides

Practical fixes I use on Ubuntu Server

’m mainly a Windows admin, but I run Ubuntu Server often enough to need reliable notes. Here are my quick, tested guides—users/groups, file permissions, SSH hardening, Fail2ban, and basic system tweaks.

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Ubuntu admin group

Ubuntu Admin Group: How to Create and Manage Users and Groups

I’m primarily a Windows administrator, but occasionally I manage Linux systems too—specifically Ubuntu Server. In this article, I’m working with Ubuntu 20.04 LTS. Since I don’t use Linux every day, I often need a quick refresher when it comes to user and permission management.

How to installFail2ban email notification

How to Install Fail2ban with Email notification

How do I enable Fail2ban email notifications on Ubuntu?

securing ssh with 2FA

Securing SSH with Two-Factor Authentication: A Linux and Proxmox Guide

As a system administrator, securing SSH access is crucial for protecting my servers. That's why I've implemented two-factor authentication (2FA) on my Linux and Proxmox systems. In this guide, I'll walk you through the process of securing SSH with 2FA, step by step.

Linux file permissions featured image

Linux file permissions explained: What you need to understand

ubuntu server

How to change the timezone in Ubuntu server

I installed an Ubuntu server 18.04. And then I discovered that the time displayed was not correct. Hey, I was pretty sure that during the gui installation process I had selected the time zone. Or had I not? Anyway, the time was one hour behind. This sort of a careless error can happen to anyone. So for those of you who might sometime be in the same boat as me: don't worry! Here's how to fix the issue and it's really easy!