Linux – ITFROMZERO – Share tobe shared!

DNS Firewall with BIND9 RPZ: Nipping Malware and Phishing in the Bud

By admin September 9, 2026

A DNS Firewall using BIND9 RPZ blocks up to 92% of malicious connections from malware and phishing. Here is a detailed guide on configuring Sinkholes and managing blacklists.

Centos

CentOS 7 End of Life: How to Revive Yum When the Official Mirrorlist Is Gone

By admin September 8, 2026

CentOS 7 has officially reached EOL, causing widespread Mirrorlist errors. Learn how to redirect your repos to the Vault archive to fix yum and keep your system running.

Centos

How to Install Zabbix 7 on CentOS Stream 9: Real-World Infrastructure Monitoring

By admin September 8, 2026

A detailed guide on installing Zabbix 7 on CentOS Stream 9. Optimize IT infrastructure monitoring with MariaDB, Nginx, SELinux configuration, and automatic alerts.

Network

WireGuard Split Tunneling Mastery: Don’t Let Your VPN Slow Down Your Internet

By admin September 6, 2026

Split Tunneling allows you to use a VPN without slowing down your connection. Learn how to configure WireGuard on Linux for selective routing by IP and domain.

Ubuntu

Building Your Own ‘Personal Netflix’ with Plex on Ubuntu: Leveraging Hardware Transcoding for Smooth 4K Streaming

By admin September 6, 2026

A guide to building a personal movie streaming system with Plex on Ubuntu. Leverage Hardware Transcoding for smooth 4K video processing and CPU resource savings.

Virtualization

Running ARM and RISC-V Code Directly on Linux: Performance “Hacks” with QEMU User-Mode

By admin September 5, 2026

A guide on using QEMU User-Mode and binfmt_misc to run ARM and RISC-V programs directly on X86 Linux. Optimize firmware builds and multi-architecture testing.

Security

Ansible Vault: Encrypting Secrets in Playbooks and Storing Them Safely in Git

By admin September 4, 2026

Hardcoding secrets in your Ansible Playbook and committing them to Git is the fastest way to lose a server. This article compares 4 approaches to managing secrets in Ansible — from env vars to HashiCorp Vault — and walks through implementing Ansible Vault step by step: the built-in, free solution that's secure enough for most teams.

Network

Optimizing MTU, Jumbo Frames, and MSS Clamping: The Secret to Fixing Slow Networks and Lag on Linux

By admin September 4, 2026

Slow network despite high bandwidth? Learn how to optimize MTU, Jumbo Frames, and MSS Clamping on Linux to fix packet fragmentation and boost performance.

MySQL

Manage MySQL Like a Pro: Boost Performance 200% with the mycli and mytop Duo

By admin September 3, 2026

Speed up MySQL administration with mycli and mytop. A detailed guide on installation, smart autocomplete, and real-time database performance monitoring directly in your terminal.

Network

Mastering NetworkManager Dispatcher: Automate ‘Everything’ When Changing Networks on Linux

By admin September 2, 2026

Stop letting manual network configuration slow you down. Learn to use NetworkManager Dispatcher Scripts to automate Routes, Firewalls, and VPNs on Linux professionally.