CentOS tutorial - IT technology blog
Posted inCentos

Installing and Configuring Chrony on CentOS Stream 9: Setting Up an NTP Server and Client for Accurate Time Synchronization

Clock drift on servers causes all kinds of problems, from SSL handshake failures to unreliable log forensics. This guide walks you through installing Chrony on CentOS Stream 9, setting up an internal NTP server, and configuring clients to sync against it — complete with a production-ready checklist and an Ansible playbook so you never get a 2 AM wake-up call about server clock drift again.
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.