Linux Administration Archives - Page 2 of 2 - ITFROMZERO

Postfix on CentOS Stream 9: A Smooth Mail Server Setup Guide to Escape the ‘Spam Folder’ Fate

By IT From Zero May 11, 2026

Don't let your system emails be unfairly blocked. Learn how to deploy a Postfix Mail Server on CentOS Stream 9 with TLS security standards to boost reliability and protect corporate data.

Centos

Centralized Logging with Rsyslog on CentOS Stream 9: Streamline logs for peace of mind

By IT From Zero May 9, 2026

Centralized log management is a vital skill for DevOps. Learn how to configure Rsyslog on CentOS Stream 9 to consolidate logs from dozens of servers into one place, making debugging 5x faster.

Centos

Live Patching Kernel Vulnerabilities on CentOS Stream 9 with kpatch: Security Updates Without Reboots

By IT From Zero April 15, 2026

Install and use kpatch on CentOS Stream 9 for 'hot' kernel security patching. Live Patching ensures 100% uptime by fixing vulnerabilities without restarting your server.

Fedora

Mastering dnf-automatic: Automating Fedora Updates Safely and Professionally

By IT From Zero April 5, 2026

Automating Fedora updates keeps your system secure from vulnerabilities. This guide covers dnf-automatic configuration, log management, and real-world server scenarios.