Posted inFedora
DNF History: The ‘Time Machine’ for Risk-Free Fedora System Tweaking
Fedora system issues after an update? Don't worry, dnf history lets you rollback, undo, and manage your software installation history safely and quickly.
Posted inVMware
RBAC on VMware vCenter: Don’t Let Junior Admins Hold the “Life and Death” Power
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.
Posted inAI
Bringing Claude Code to CI/CD: Hands-Free Code Reviews and Automated Testing
A guide to integrating Claude Code into CI/CD to automate code reviews, security audits, and unit tests. Save hours of coding and effectively optimize API costs.
Posted inSecurity
SPF, DKIM, and DMARC: The ‘Atomic Trio’ for 100% Email Inbox Delivery
Don't let your emails disappear into the Spam folder. Here is a detailed guide on configuring SPF, DKIM, and DMARC to secure your domain and enhance sender reputation for IT pros.
Posted inMonitoring
24/7 Internet Bandwidth Monitoring: Holding Your ISP Accountable with Prometheus and Grafana
On a 300Mbps plan but still lagging? Here is a detailed guide on using Speedtest Exporter, Prometheus, and Grafana for 24/7 monitoring, with real-world tips for handling alert fatigue.
Posted inAI
AI Agent for Server Log Monitoring: From On-call Nightmares to Smart Telegram Alerts
Turn GBs of log files into focused Telegram alerts with an AI Agent. Learn how to use Python and Gemini API to filter noise, analyze server errors, and suggest instant fixes.
Posted inSecurity
Teleport: How I Managed 50+ Servers and K8s Without Using a Single SSH Key
Managing SSH keys for dozens of servers is a significant security challenge. This article shares practical experience in deploying Teleport—an SSH alternative using short-lived certificates to centralize Server and Kubernetes management with detailed audit logs.
Posted inLinux
Mastering lsof on Linux: Pro Tips for Finding Processes Occupying Ports and Fixing ‘Too Many Open Files’ Errors
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.
Posted inLinux
Hunting Down CPU-Hogging “Culprits” on Linux: Mastering perf and Flame Graphs
A detailed guide on using perf on Linux for CPU profiling and Flame Graph generation. Learn how to pinpoint slow functions with minimal overhead.
Posted inPython
Build a Pro Data Dashboard in 15 Minutes with Streamlit: Say Goodbye to Frontend Woes
Stop wasting days on HTML/CSS just to build a dashboard. Discover how to create professional data analytics apps with Python and Streamlit in just 15 minutes.