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🛡️ Protect Your Ubuntu Server with Fail2Ban: Step-by-Step Guide

Securing your Linux server is a critical task for every sysadmin. One of the simplest yet most effective ways to guard against brute-force login attempts is by using Fail2Ban. In…

How To

📡 Getting Started with tcpdump: A Beginner’s Guide for Linux Sysadmins

As a Linux system administrator, understanding what happens on your network is crucial. One of the most powerful tools to monitor network traffic directly from the command line is tcpdump.…

Cheat Sheet

MegaCLI Cheat Sheet

MegaCLI: useful commands Here are some useful commands: View information about the RAID adapter For checking the firmware version, battery back-up unit presence, installed cache memory and the capabilities of…

News

Using the 3-2-1 Backup Rule to Design Your Backup Strategy

The 3-2-1 is a foundational backup strategy that has been upheld as a best practice for decades. Read on to find out how to improve on it by using the…

How To

How to Install Grub Customizer on Ubuntu 24.04, 22.04 or 20.04

Grub Customizer is a powerful graphical tool for managing and configuring the GRUB bootloader. It provides an easy-to-use interface for editing GRUB menu entries, setting default boot options, and customizing…

Cheat Sheet

Tmux Cheat Sheet

Sessions $ tmux $ tmux new $ tmux new-session : new Start a new session $ tmux new-session -A -s mysession Start a new session or attach to an existing session named mysession $ tmux new -s…

How To

How to Blacklist and Whitelist Email or Domain in Zimbra 8

How to Blacklist and Whitelist Email or Domain in Zimbra 8, in the previous article discussed How to Block Email or Domain in MTA Zimbra 8. In this method, we…