Troubleshooting

Only Half of the vCPUs Displayed in Task Manager for Azure VMs

by

When migrating virtual machines (VMs) to Azure, some users have reported seeing only half of the expected vCPUs in Task Manager, despite the hardware and device manager showing the correct number of CPUs. This article explains the root cause of the issue and provides a step-by-step solution that has been successfully implemented. Issue Overview After migrating … Read more

Why Can’t I cd Into a Directory in Linux? Troubleshooting Tips

by

Navigating directories in Linux using the cd command is usually straightforward, but sometimes you might run into issues. Here’s a step-by-step guide to troubleshoot and resolve common problems when you can’t cd into a directory. 1. Check for Typos The first step is to ensure the directory name is spelled correctly. A typo can prevent you from accessing the … Read more

Understanding the Linux OOM Killer: A Fun Illustration

by

Introduction The OOM Killer (Out-of-Memory Killer) is a critical mechanism in Linux that steps in when the system runs out of memory. It terminates processes to free up memory and keep the system running. While it’s a lifesaver in low-memory situations, its behavior can sometimes seem arbitrary or confusing. To help you understand the concept behind the … Read more

Keywords When Browsing Linux Logs

by

Troubleshooting Linux systems often requires browsing logs to identify issues effectively. Knowing the right keywords to search for can help narrow down problems quickly. This guide categorizes common issues and provides relevant keywords and log file suggestions for Linux systems, whether in cloud environments or on-premises. 1. Authentication and Access Issues Keywords: Logs to Check: … Read more

Troubleshooting File Operations in Linux: Cannot Delete, Copy, Rename, or Move a File

by

Encountering issues when trying to delete, copy, rename, or move a file in Linux can be frustrating. This guide outlines common causes and solutions to help you troubleshoot and resolve these problems efficiently. Common Causes and Solutions 1. Does the File Actually Exist? Sometimes, the file you are trying to manipulate might not exist, or the … Read more

Linux Tips: 10 Things You Shouldn’t Do (And What to Do Instead)

by

Avoid common pitfalls in Linux administration by following these practical tips. Learn how to handle permissions, troubleshoot errors, and secure your system effectively. 1. Avoid Running Commands That Change Multiple Properties Instead of running commands that change a large number of properties, focus on specific files or directories related to the issue you are troubleshooting. … Read more

What is a Kernel Panic and How to Handle It?

by

A kernel panic is a critical error that occurs when the operating system detects an issue at the kernel level, causing it to freeze and stop functioning. While it may sound alarming, understanding what causes a kernel panic and how to address it can help you resolve the issue calmly and effectively—whether you’re working with … Read more