VMware tutorial - IT technology blog
Posted inVMware

Configuring vSphere Alarms and Email Notifications: Automated SysAdmin Alerts When ESXi CPU, RAM, and Datastore Exceed Thresholds

A comparison of three ESXi monitoring approaches (native alarms, Zabbix, PowerCLI) and a practical walkthrough for deploying vSphere Alarms to automatically email SysAdmins when CPU, RAM, or Datastore usage hits dangerous thresholds. Step-by-step from SMTP configuration to fine-tuning thresholds to avoid alert fatigue.
Linux tutorial - IT technology blog
Posted inLinux

How to Configure kdump on Linux: Collecting Kernel Crash Dumps and Analyzing Critical System Failures

kdump captures the entire state of RAM at the moment of a kernel panic — before the system has a chance to reboot. It is the only tool that allows sysadmins to investigate the root cause of a server crash when the logs record nothing. This guide covers installing and configuring kdump on RHEL/CentOS/Ubuntu, safely triggering a test crash, and analyzing vmcore files with the crash tool.
CentOS tutorial - IT technology blog
Posted inCentos

How to Use sosreport on CentOS Stream 9: Collect and Analyze System Information for Professional Troubleshooting

sosreport is Red Hat's official tool for collecting complete system information with a single command, replacing the need to run dozens of manual commands every time an incident occurs. This article compares different approaches to information gathering, weighs their pros and cons, and walks through a practical sosreport deployment on CentOS Stream 9 — including a script you can integrate directly into your incident response workflow.