System Admin – ITFROMZERO – Share tobe shared!

Setting Up a Local Yum/DNF Repository: A Lifesaver for Slow Networks or Offline Environments

By admin May 27, 2026

A detailed guide on self-hosting a Local Yum/DNF Repository. An optimal solution to speed up software installation and manage Linux servers in local networks or offline environments.

Monitoring

btop Installation Guide on Linux: Bringing a Fancy Dashboard to Your Terminal

By admin May 15, 2026

Install btop to replace htop on Linux. A powerful resource monitoring tool with a smooth C++ dashboard interface, mouse support, and intuitive visual graphs.

VMware

RBAC on VMware vCenter: Don’t Let Junior Admins Hold the “Life and Death” Power

By admin May 14, 2026

RBAC permission management on vCenter is a vital skill for protecting virtualized systems. This article shares how to set up Roles and Permissions based on real-world experience managing an 8-host cluster.

Network

Setting up a Virtual LAN with ZeroTier: Connect Servers and PCs Remotely Without Port Forwarding

By admin May 11, 2026

Connecting servers and PCs remotely has never been easier thanks to ZeroTier. Create a global virtual LAN without port forwarding or static IPs. Detailed guide on installation and P2P optimization.

Network

Installing SmokePing on Linux: How to Diagnose Network Jitter and Latency 24/7

By admin May 11, 2026

Network slow but ping looks fine? Install SmokePing on Linux to track latency, jitter, and packet loss 24/7. A practical guide to detailed configuration.

Monitoring

Telegraf Installation Guide: The ‘Backbone’ of Metrics Collection for InfluxDB

By admin May 2, 2026

A detailed guide on installing and optimizing Telegraf. Collect metrics from Linux and Docker for InfluxDB to build a professional monitoring system.

Network

Configuring GRE and IPIP Tunnels on Linux: Lightweight Site-to-Site Connectivity Without a VPN

By admin April 30, 2026

A guide to configuring GRE and IPIP tunnels on Linux. This article focuses on practical setup, MTU/MSS optimization to prevent packet loss, and persistent configuration.

Python

Python & Netmiko: Rescuing Network Engineers from 3 Hours of Manual Switch Configuration

By admin April 19, 2026

Manual network administration becomes a burden as systems scale. Learn how to use Python and Netmiko to automate bulk Cisco and Juniper device configuration safely.

Docker

Docker Log Management: Prevent Your Disk from Filling Up with Massive Log Files

By admin April 4, 2026

Don't let Docker log files crash your server. Learn how to configure Log Rotation, use log commands efficiently, and deploy centralized log management systems like Loki and ELK.

Linux

Log Rotation on Linux with Logrotate: Rescuing Your Disk Drive in the Middle of the Night

By admin March 10, 2026

As an IT engineer, I've experienced servers crashing at 2 AM due to full log files. This article consolidates hard-earned experience on using Logrotate on Linux, an indispensable tool for automatically managing, rotating, and compressing log files to keep your system stable and efficient.