Troubleshooting – ITFROMZERO – Share tobe shared!

Mastering chroot on Linux: From Sandbox Isolation to Real-World System Rescue

By admin May 18, 2026

Discover how to use chroot for application isolation and Linux boot rescue. A practical guide to mastering your system without the need for complex Docker or VM setups.

VMware

Fixing the ‘The virtual machine is in use’ Error: How to Handle .lck Files to Rescue VMware VMs

By admin May 18, 2026

Is your VMware VM showing 'The virtual machine is in use' and causing stress? Check out this guide on safely deleting .lck files to unlock your VM on Workstation and ESXi.

Linux

Mastering lsof on Linux: Pro Tips for Finding Processes Occupying Ports and Fixing ‘Too Many Open Files’ Errors

By admin May 14, 2026

Linux users shouldn't miss out on lsof for monitoring file descriptors and fixing 'Too many open files' errors. Check out 5 real-world troubleshooting tips from a system expert.

Docker

Docker Containers Shutting Down Slowly and Zombie Process Errors: A Complete Fix with Tini

By admin May 5, 2026

Docker containers hanging during shutdown? Discover how to use Tini to resolve Zombie Processes and Signal Handling, making your apps more stable and professional.

Linux

How to Use strace to Debug Applications on Linux: Tracing System Calls and Finding Root Causes Effectively

By admin April 28, 2026

strace lets you trace every system call a process makes on Linux — from file opens and network connections to lock waits — without needing source code or recompiling. This guide covers practical strace usage for debugging permission errors, missing files, hanging services, and I/O bottlenecks.

VMware

Diagnosing VMware ESXi with esxtop: A Practical Troubleshooting Field Guide

By admin April 28, 2026

Stop guessing and start diagnosing. Use esxtop to accurately identify CPU Ready, RAM Swap, and Disk Latency bottlenecks on VMware ESXi like a seasoned systems engineer.

VMware

Mastering VMware vSphere Logs: Troubleshooting Systems with vmware.log, hostd.log, and vpxd.log

By admin April 25, 2026

Learn to master log analysis in VMware vSphere. This guide shows you how to use Linux commands to inspect vmware.log, hostd.log, and vpxd.log to troubleshoot virtualization issues like a pro.

Linux

Effective Linux Debugging: A Detailed Guide with journalctl and dmesg

By admin March 24, 2026

Debugging on Linux is an essential skill. journalctl and dmesg are two powerful tools that help you identify the root cause of any issue, from services to hardware. This article guides you on how to use them effectively.

Network

Diagnosing Network Issues on Linux: Using mtr and traceroute like an Experienced Engineer

By admin March 18, 2026

In urgent situations, when a network is "slow" for unknown reasons, traceroute and mtr are indispensable tools for diagnosing issues. This article provides a detailed guide on using them to identify packet loss, latency, and routing problems, helping you quickly resolve Linux network issues.

Network

Free Online Network Tools for SysAdmins: Subnet Calculator, DNS Lookup, IP Converter

By admin March 15, 2026

Free online network tools I keep bookmarked for emergency troubleshooting: Subnet Calculator for CIDR/overlap, DNS Lookup for propagation checks, IP Converter for cross-platform configs — all run directly in the browser, no installation needed.