system administration – ITFROMZERO

Configuring VRF on Linux: A ‘Divide and Conquer’ Solution for Routing Tables

By admin June 5, 2026

Manage multi-tenant networks more effectively with VRF on Linux. Learn how to isolate routing tables, handle IP conflicts, and run isolated applications.

Linux

Mastering Core Dumps on Linux: Pro Tips for Troubleshooting Segmentation Faults

By admin June 1, 2026

No more guessing when apps crash! A detailed guide on configuring Core Dumps on Linux to catch Segmentation Faults and using gdb to find the exact line of code causing the error.

Network

Deploying Multicast on Linux: A Bandwidth-Saving Solution for Large-Scale Transmission Systems

By admin May 31, 2026

Optimize internal network bandwidth by configuring Multicast on Linux. Detailed guide on setting up PIM-SM, IGMP, and troubleshooting TTL and RPF check errors.

Linux

stress-ng: The “Heavyweight” Test for Linux Server Stability

By admin May 30, 2026

A comprehensive guide to using stress-ng for CPU, RAM, and Disk stress testing on Linux. Discover tips for verifying server stability and detecting hidden bugs before deployment.

Ubuntu

Logwatch: Condense Thousands of Ubuntu Log Lines into a Daily Email Report

By admin May 27, 2026

Learn how to install Logwatch on Ubuntu to automate system log monitoring. This guide provides detailed configuration to receive daily summary reports via email, saving server administration time.

Network

Mastering Nginx Stream Module: TCP/UDP Load Balancing for Databases, Redis, and MQTT

By admin May 27, 2026

A practical guide to using Nginx Stream Module for TCP/UDP load balancing for MySQL, Redis, and MQTT. Learn Layer 4 configuration, security optimization, and real-world troubleshooting tips.

Database

Barman: Professional PostgreSQL Production Backup Solution – From WAL Archive to PITR

By admin May 27, 2026

Don't let pg_dump keep you up at night. Detailed guide on using Barman for professional PostgreSQL backup management with second-precision data recovery (PITR).

VMware

VMware Storage DRS (SDRS) Mastery: No More ‘Night Shifts’ for Datastore Cleanup

By admin May 24, 2026

Forget staying up all night cleaning up VM storage. Here is a detailed guide on configuring VMware Storage DRS (SDRS) to automate load balancing and optimize Datastore Clusters based on real-world experience.

Ubuntu

Turn Ubuntu into a Print Server with CUPS: A Stable Printing Solution for Small Offices

By admin May 23, 2026

Learn how to set up a Print Server on Ubuntu using CUPS to share USB printers over a local network. A stable, energy-efficient solution that supports Windows, Linux, and macOS.