Runtime CVE Scanning with Trivy in GitLab CI: Auto-block Images
Integrate Trivy into GitLab CI to scan container images at runtime and automatically block vulnerable builds before deployment.
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Using systemd WatchdogSec to Auto-Recover Hung Services
Learn how WatchdogSec detects unresponsive systemd services and triggers automatic restarts to improve system reliability.
Detecting Anomalous sudo Session Duration with LLM and iptables Automation
Use LLMs to analyze syslog for unusual sudo session lengths and automatically block IPs via iptables—practical steps for Linux admins.
Borg zstd Level 19 Compression: Storage Savings and CPU Impact Test
I tested Borg with zstd compression level 19 to cut backup storage by ~40%. Here are the real CPU, time, and size results from my production environment.
Rate-Limit DHCP Requests with ebtables on Linux Bridge
Limit ARP and IPv4 packet rates on a Linux bridge using ebtables to reduce DHCP starvation attack impact.
Automating SBOM and License Compliance in GitLab CI with Trivy
Learn how to use Trivy in GitLab CI to generate SBOMs and scan for HIGH/CRITICAL CVEs and license issues automatically.
Prevent journald Disk Spikes with RateLimitInterval and Burst Settings
Learn how to tune systemd-journald.conf to stop log floods from filling your disk and monitor journal usage effectively.
Fail2ban + LLM: Auto-block SSH brute force using log analysis
Use an LLM to analyze SSH auth logs and dynamically adjust Fail2ban bans for smarter brute force defense.
Isolating Dangerous Commands with systemd-nspawn and seccomp
Use systemd-nspawn with a custom seccomp profile to block risky syscalls and test untrusted commands safely in a minimal container.
Disable SMB v1 Completely on Windows Server 2022 Using PowerShell
Turn off legacy SMB v1 on Windows Server 2022 with Set-SmbServerConfiguration and verify with Get-SmbServerConfiguration — includes verification steps and common pitfalls.
Safe External Writes with foreachBatch in Spark Structured Streaming
Learn how to achieve exactly-once guarantees when writing to external systems using foreachBatch, checkpointing, and idempotent writes in Spark Structured Streaming.
auditd ile /etc/passwd ve /etc/shadow Yazma Girişlerini Anlık Algılama ve Engelleme
auditd kullanarak parola dosyalarına yetkisiz yazma girişlerini gerçek zamanlı algılayın ve otomatik engelleme kurun.
Configuring Linux tc for VoIP DSCP EF Marking and Priority Queuing
Use Linux traffic control to mark VoIP packets with DSCP EF and prioritize them to reduce jitter and packet loss.
Encrypt Network Backups with Restic Using --stdin and --stdout Pipes
Learn how to securely stream encrypted backups over SSH with restic --stdin and --stdout — no temp files, no exposed data.
Latency SLO-Based Canary Analysis and Auto Rollback in Argo Rollouts
Use Prometheus latency metrics to drive Argo Rollouts canary analysis and trigger automatic rollbacks when SLOs are breached.
Configuring DNS-over-TLS and DNSSEC with systemd-resolved: Setup and Troubleshooting
Learn how to enable DoT and DNSSEC in systemd-resolved, verify with resolvedctl and journalctl, and fix common validation failures.
Detecting Suspicious sudo Usage with LLM from syslog and Blocking via iptables
Use an LLM to analyze sudo commands in syslog and automatically generate iptables rules to block malicious users in real time.
Using Linux tc netem to Add Jitter for Realistic WAN Simulation
Simulate variable network delay in pre-production with tc netem to test application resilience under realistic WAN jitter before deployment.
Running Sub‑Minute Tasks with systemd Timers: AccuracySec and OnUnitActiveSec
Replace cron with systemd timers for millisecond‑precise scheduling and jitter control using AccuracySec and OnUnitActiveSec.
Visualizing Borg Backup Success and Failures in ELK with Structured JSON Logs
Learn how to configure BorgBackup --log-json for centralized monitoring in ELK, visualize backup outcomes, and set up alerts for failures.
Using Latency SLOs Instead of Error Rate in Argo Rollouts Canary Analysis
Learn how to protect user experience by promoting canary releases based on latency SLOs instead of error rates in Argo Rollouts, with real config examples.
Detecting Invalid sudo Commands from syslog with LLM for iptables Blocking
Use LLM to analyze syslog for unauthorized sudo attempts and generate proactive iptables rules to block attackers before they succeed.
Testing Risky Commands with systemd-nspawn and seccomp Profiles
Learn how to safely run untrusted scripts using systemd-nspawn with custom seccomp filters for command-line sandboxing on Linux.
How to Fully Disable SMB v1 on Windows Server 2022 with PowerShell
Disable SMB v1 on Windows Server 2022 using PowerShell to remove security risks and measure impact on legacy clients before removal.
Safe External Writes in Spark Structured Streaming with foreachBatch
Learn how to use foreachBatch for idempotent, exactly-once writes to external systems in Spark Structured Streaming — avoiding duplicates and data loss.
Monitoring /etc/hosts.allow and hosts.deny Changes with auditd
Learn how to use auditd to detect real-time modifications to TCP wrappers files and get instant alerts on unauthorized changes.
Protect Linux Bridge from DHCP Starvation with ebtables Rate Limiting
Stop DHCP solicit floods on Linux bridges using ebtables rate limiting to prevent IP exhaustion and network disruption.
Using Restic --password-file in cron to avoid environment variable risks
Secure your Restic backups in cron by using --password-file instead of exposing passwords in environment variables or scripts.
Generate SBOM and Check License Compliance in GitLab CI with Trivy
Detect open-source license risks early in CI by generating SBOMs and scanning dependencies with Trivy in GitLab pipelines.
Prevent journald Disk Full with RateLimitInterval and Burst Settings
Learn how to control systemd-journald disk usage using RateLimitInterval and Burst to avoid log floods filling your root filesystem.
Fail2ban + LLM: Auto-Block SSH Brute Force IPs from Logs
Use LLMs to analyze Fail2ban logs and auto-generate iptables blocks for abnormal SSH login attempts — reduces noise and catches evasion.
Memory and IO Limits with systemd Slice: Resource Isolation Guide
Learn how to use systemd Slice to enforce memory and IO limits on services for better resource isolation and system stability.
Using Trivy in GitLab CI to Scan Container Images for SBOM and CVEs
Generate SBOM JSON and scan containers for vulnerabilities in GitLab CI with Trivy. Practical setup, pitfalls, and real output examples.
Preventing IPv6 Neighbor Discovery Attacks with MLD Snooping
Learn how MLD snooping stops malicious IPv6 neighbor discovery traffic, protecting your network from spoofing and DoS attacks with practical switch config.
Generate Temporary iptables Rules from Logs Using AI
Use LLMs to analyze security logs and auto-create short-lived iptables blocks. Practical steps for Linux admins.
Configuring DNS-over-TLS and DNSSEC with systemd-resolved
Step-by-step guide to encrypt and validate DNS queries system-wide using systemd-resolved on Linux, improving privacy and security.
Force SMB Compression in Windows Server 2022 via PowerShell and Measure CPU Impact
Learn how to enable SMB compression with PowerShell, test transfer speeds, and monitor CPU usage to balance performance and load on Windows Server 2022.
Prevent Data Loss in Spark Structured Streaming with Watermark and allowedLateness
Learn how to handle late-arriving events in Spark Structured Streaming using watermark and allowedLateness to avoid data loss and ensure correctness.
Prevent /etc/passwd and /etc/shadow Writes Using auditd Rules
Use auditd to block and alert on unauthorized writes to critical Linux password files with practical rule examples.
Linux tc VoIP DSCP EF marking and priority queue configuration
Configure Linux traffic control to prioritize VoIP traffic using DSCP EF markings and reduce latency and jitter for real-time calls.
Restic encrypted network backup using stdin/stdout for streaming
Learn how to pipe data through restic with --stdin and --stdout for secure, streaming backups over SSH without temp files.
Configure DNS-over-TLS and DNSSEC with systemd-resolved for DNS-over-TLS
Step-by-step guide to enable encrypted DNS and DNSSEC validation using systemd-resolved on Linux for secure name resolution.
AI-Powered Log Analysis: Generating Temporary iptables Rules from Syslog
Use LLMs to analyze security logs and auto-suggest precise iptables rules to block threats in real time.
How to Control Linux Bridge MAC Table Ageing Time with brctl setageing
Learn how to adjust bridge FDB ageing time using brctl setageing to manage MAC table flush frequency and improve ARP cache stability in Linux networks.
Secure encrypted backups over network using restic --stdin and --stdout pipes
Learn how to stream encrypted backups directly via tar, SSH, and restic without temporary files, reducing disk usage and attack surface.
Argo Rollouts ile Canary Dağıtımında Prometheus Metrikleriyle Otomatik Geri Alma
Prometheus metrikleriyle canary analizini yapıp Argo Rollouts'te otomatik rollback kurulumu. Gerçek ortam deneyimiyle adım adım.
How to Sample User and Kernel Functions Separately with perf top
Learn to use perf top -u and -k to isolate user-space and kernel-space hotspots for precise performance tuning.
LLM-generated iptables rules from security logs: LOG and DROP suggestion prompt
Use an LLM to analyze firewall logs and suggest temporary iptables rules. Practical prompt template for LOG and DROP actions.
Configuring systemd-resolved for DNS-over-TLS with StubListener and DNSSEC
Learn how to secure DNS resolution on Linux using systemd-resolved with DoT, StubListener, and DNSSEC validation, including fallback settings and verification steps.
Enforcing SMB Compression on Windows Server 2022 with PowerShell and Measuring CPU Impact
Enable SMB compression via Set-SmbServerConfiguration, monitor CPU usage with PerfMon, and assess real-world performance trade-offs on file transfers.
How to Prevent Data Loss in Spark Structured Streaming with Watermark and allowedLateness
Learn how to use watermark and allowedLateness in Spark Structured Streaming to handle late events and avoid data loss in event-time processing.
Prevent /etc/passwd and /etc/shadow Write Attempts with auditd Rules
Use auditctl and augenrules to monitor and block unauthorized writes to critical password files in real time via systemd integration.
Linux tc DSCP Marking for VoIP Priority and EF Queue Configuration
Configure Linux traffic control to mark VoIP packets with DSCP EF, prioritize them, and verify SLA with jitter measurements.
Using BorgBackup --exclude-if-present to Skip Folders with .nobackup
Learn how to automatically exclude directories from Borg backups using a marker file, reducing backup size and complexity.
Using Trivy in GitLab CI for SBOM JSON and Container CVE Scanning
Generate SBOM JSON with Trivy in GitLab CI, then use it for dependency tracking and policy enforcement — here's how I do it.
How to Limit Memory and IO for systemd Services Using Slices
Learn to isolate critical services with systemd slices, MemoryMax, and IOWeight to prevent resource starvation on Linux servers.
AI ile log anomaly detection: GPT-4o mini syslog hatalarını bulma
Kendi ortamımda GPT-4o mini ile syslog çekirdek hatalarını %95 doğrulukla tespit etme yöntemi; prompt, örnek kod ve otomatik eylem adımları.
Blocking IPv6 Neighbor Discovery Attacks with MLD Snooping on Switches
Enable MLD snooping to drop rogue RA packets and stop neighbor discovery spoofing on Layer 2 switches — practical config for Cisco and Linux bridges.
Visualizing Restic Snapshot Changes with diff and jq
Learn how to use restic diff --json and jq to visualize file changes between snapshots and identify high-change directories for backup auditing.
Meeting SLSA Level 2 in GitLab CI with SBOM and Provenance
How to generate SBOMs, sign artifacts, and attach provenance in GitLab CI to achieve SLSA Level 2 for supply chain integrity.
Profiling kernel function calls with Perfetto at microsecond resolution
Use Perfetto and tracepoint events to pinpoint latency sources in sched/switch and irq/handler at function level.
AI-assisted yamllint rule suggestions with GPT-4o for fewer false positives
Use GPT-4o to analyze your .yamllint config and generate custom rules that reduce noise and catch real issues in your YAML files.
Using systemd-nspawn seccomp profiles for risky command testing
Learn how to safely run dangerous commands in isolated containers using Capabilities= and SystemCallFilter= for better security than chroot.
Enforcing SMB Signing on Windows Server 2022 Without Breaking Legacy Clients
Learn how to audit and enforce SMB signing using Get-SmbServerConfiguration and Enable-SmbServer -ForceSecurityAuthentication while maintaining compatibility with older systems.
Solving Spark Small Files After Shuffle with Adaptive Coalesce
Enable spark.sql.adaptive.coalescePartitions.enabled to reduce small files post-shuffle and improve Spark job performance in practice.
Auditd ile Yetkisiz Crontab Değişikliklerini Anlık SIEM'e Aktarma
Auditd ile /var/spool/cron izleme, -k cron_tamper kuralı ve real-time alerting için rsyslog/forwarder örneği.
Automate ARP Spoofing Protection on Linux Bridge with ebtables
Learn how to use ebtables and static ARP entries to block ARP spoofing on Linux bridges and prevent MITM attacks in your network.
Reduce Backup Storage Costs 40% with Borg zstd Level 19 Compression
Cut storage needs by 40% using BorgBackup with zstd level 19, balancing speed and ratio, plus verified restore steps.
Inject Helm Values from SOPS Encrypted Secrets in Argo CD
Learn how to securely inject encrypted Helm values using SOPS and Argo CD's Helm plugin without exposing secrets in Git.
Catch systemd Service Memory Leaks Early with MemoryUsage and WatchdogSec
Learn how to detect memory leaks in systemd services before OOM kills using MemoryUsage= and WatchdogSec= for early warnings and automatic restarts.
Detecting Unauthorized SSH Logins with LLM-Based Log Analysis
Use LLMs to analyze SSH logs in real time and catch brute-force attempts before they succeed. Practical setup and tuning tips.
How to Adjust OOM Score in Linux to Protect Critical Services
Learn how to control which processes get killed first during memory pressure using OOM score adjustment on Linux servers.
Encrypting ZFS Snapshots During send/receive for Secure Backup Streams
Learn how to encrypt ZFS snapshots on the fly during send/receive to protect data in transit without storing unencrypted backups.
How to Inject Network Latency with tc for Pre‑Prod Testing
Use Linux tc to simulate real-world delays, jitter, and loss so you can validate app resilience before deploying to production.
How to Encrypt Kubernetes Secrets in Git with SOPS and Age
Learn to securely store encrypted secrets in Git using SOPS and Age for Helm charts in under 10 minutes — practical setup with commands and pitfalls.
AI-Powered YAML Validation: Fix Config Errors Faster with GPT-4
Use GPT-4 with yamllint to get smart fix suggestions for YAML config errors — cut debugging time and avoid deployment surprises.
Prevent Disk Full Events with systemd-journald Rate Limiting
Stop runaway logs from filling your disk by applying journald rate limits. Practical config steps for Linux admins.
5 Ways to Fix Cron Jobs That Won't Run – PATH, Env & Mail
Learn how to troubleshoot silent cron failures by checking PATH, environment variables, and mail output with practical commands and real‑world examples.
BGP Route Leak Protection: Stop Traffic Hijacking with RPKI
Learn BGP route leak protection and RPKI validation to prevent misrouted traffic from hijacking global internet routes. Practical config for FRRouting and Cisco IOS-XE.
Snapshot Backup Fast Recovery: Block-Level Restore in Seconds
Move beyond file-based backups with block-level snapshots. Learn how snapshot backup fast recovery works and restore systems in seconds, not hours.
Shrink Docker Image Size Up to 10x With Multi-Stage Builds
Reduce Docker image size up to 10x using multi-stage builds and Alpine-based images. Practical Dockerfile patterns, commands, and pitfalls from real ops work.
Linux High CPU Usage: Kernel Space Troubleshooting Guide
When top shows no process eating CPU but load is high, the kernel is leaking. Here's how I profile kernel-space CPU usage in Linux production servers.
AI CLI Tools for Sysadmins: Automating Log Analysis and Error Detection
How AI-powered CLI tools automate log analysis and error detection for sysadmins. Practical examples with lg, ollama, and shell pipelines.
VLAN Configuration: Isolate Network Traffic the Right Way
Learn VLAN segmentation, trunk port setup, and common misconfigurations to improve network security and performance. Practical ops guide with commands.
Cloud Backup Cost Optimization: 5 Ways to Cut Rising Storage Bills
Cloud backup costs spiraling out of control? Here are 5 practical optimization techniques using compression, lifecycle policies, and tiered storage to cut your bills.
GitOps Infrastructure Management: Eliminate Manual Deployments
GitOps puts your infrastructure under version control so every change is tracked, reviewed, and deployed automatically. Cut human error and manual SSH sessions.
How Fast Can You Detect a Data Breach? Mean Time to Detect Explained
Most breaches go unnoticed for months. Learn how to reduce mean time to detect, improve visibility, and catch exfiltration before data is gone.
DevOps vs Traditional Sysadmin: Which Model Wins in 2025?
Compare DevOps and traditional system administration across automation, culture, tooling, and scalability. See which IT operations model fits your team and infrastructure.
Lesser-Known Cybersecurity Tools That Security Pros Actually Use
Discover lesser-known but effective cybersecurity tools that pros rely on daily. From BloodHound to TruffleHog, these are the tools most people overlook.
25 Linux Sysadmin Tools That Save Hours Every Week
A practical list of 25 Linux system administrator tools I use daily to speed up routine ops work, troubleshooting, monitoring, and automation tasks.
Big Data and AI Combined: Real-World Use Cases That Actually Work
Big data and AI combined unlock predictive maintenance, anomaly detection, and real-time analytics. Here are the unified scenarios I run in production.
How AI Agents Reshape Enterprise IT Operations and Workflows
How AI agents are changing enterprise operations by automating monitoring, incident response, and routine admin tasks. Practical ops impact and deployment tips.
Windows Client Slowdown: Hidden Causes of Performance Loss
Windows client performance loss often comes from hidden bloat, background services, and disk issues. Here's how I find and fix the real causes.
7 Ways to Find the Real Cause of Network Slowness
Diagnose network slowness systematically with 7 proven methods covering latency, bandwidth saturation, DNS delays, MTU mismatches, and packet loss.
3-2-1 Backup Rule: Why Having a Backup Is Not Enough
Having backups without the 3-2-1 rule means you are not safe. Learn how to implement 3-2-1 backup strategy practically across Linux and Windows environments.
CI/CD Pipeline Vulnerabilities: How Security Gaps Creep Into DevOps
How vulnerabilities emerge in CI/CD pipelines, from leaked secrets to overprivileged runners. Learn the common gaps and practical fixes to harden your DevOps delivery chain.
2026 Cybersecurity Threats: What Enterprises Must Prepare For Now
AI-powered ransomware, identity-based attacks, and supply chain threats define the 2026 cybersecurity landscape. Here's what enterprises must prepare for now.
Linux System Administration Without Root: Least Privilege With Sudo
Manage Linux systems without giving root access. Learn sudoers configuration, command restrictions, and least privilege practices for secure sysadmin work.
Big Data Without Big Data: Extracting Decisions from Small Datasets
You don't need petabytes to make smart decisions. Here's how I use big data tools and statistical methods to extract real value from small datasets.
Windows Server Performance Killers: Hidden Settings to Fix Now
Hidden Windows Server settings quietly drain performance. I cover power plans, SysMain, Defender exclusions, and RDS tuning to bring your server back to speed.
Disaster Recovery Plan Mistakes That Wreck Your Backups
Common disaster recovery plan mistakes that break backups at the worst moment. Learn what to fix before ransomware or hardware failure hits your infrastructure.
What Is DevOps Culture? How It Reshapes Software Teams
DevOps culture is not about tools but shared responsibility, automation, and fast feedback. Here is how it changes the way software teams actually work.
How Attackers Breach Companies: Real Attack Scenarios & Vectors
Realistic attack vectors hackers use to breach companies: phishing, exposed RDP, unpatched VPNs, credential stuffing, and supply chain compromises with practical defense tips.
Social Engineering Attacks: Why the Human Factor Is Your Weakest Security Link
Social engineering exploits human trust, not code. Learn how attackers bypass technical controls and how to build practical defenses against process failures.
Linux vs Windows Server: Choosing the Right OS by Real-World Scenario
Linux vs Windows Server compared by actual workload. Picking the right OS for web, AD, file serving, and containers based on real ops criteria.
Why 80% of Big Data Projects Fail: Root Causes and Fixes
Most big data projects fail due to poor data quality, unclear goals, and ops gaps. Learn the common failure patterns and how to avoid them.
AI for Sysadmins: Cut 1-Hour Tasks to 5 Minutes
How I use AI tools to automate sysadmin work — log analysis, script generation, config drafting, and troubleshooting. Real ops examples, not hype.
Windows Performance Tuning: Settings That Actually Speed Up Your PC
Practical Windows performance tuning settings that reduce boot time, cut background CPU usage, and make your system noticeably faster without gimmicks.
Slow Wi-Fi? Why Your Internet Provider Probably Isn't the Problem
Diagnose local network issues causing slow Wi-Fi. Learn how to isolate router, interference, and LAN bottlenecks before blaming your ISP.
Backup Without Restore Testing Is Just Wasted Storage
Backups that never get restore tested will fail when you need them most. Here is how I run restore drills in production without losing my mind.
Why DevOps Engineers Earn More: Skills, Blame, and the Production Gap
Why DevOps engineers earn more than developers: broader skill stack, production accountability, and the cost of failure. Real ops perspective on salary gap.
Ransomware Incident Response: First 60 Minutes Checklist
What to do in the first hour after a ransomware attack. A practical incident response checklist for sysadmins: isolate, preserve evidence, assess scope, and contain the threat.
Why Big Data Projects Still Fail: The Expectation vs Operations Gap
Big data investments fail when ops realities meet vendor promises. Here's what I see in the field: storage sprawl, broken pipelines, and silent data loss.
Will AI Replace Software Developers? Real Data from the Field
Will AI replace software developers? Here's what real ops data says about Copilot, ChatGPT, and dev jobs. No hype, just ground-level observations.
12 Dangerous Windows Default Settings to Disable After Install
Fresh Windows installs carry risky defaults. Here are 12 settings I disable on every server and workstation to reduce the attack surface.
Find Unauthorized Devices on Your Network in 10 Minutes
Quick network inventory and rogue device detection using nmap, arp-scan, and DHCP logs. Spot unknown machines on your LAN before they become a security incident.
Backups That Fail on Restore: The Silent Data Loss Scenario
A backup that cannot be restored is not a backup. Here is how I test restore procedures, avoid silent failures, and verify backups before data loss happens.
What Hackers Do First After Breaking Into Your Linux Server
Discover the first moves attackers make after breaching a Linux server, from disabling logging to planting backdoors, and learn how to detect each step.
15 Linux Terminal Commands I Actually Use in Production Ops
Real Linux terminal commands I rely on daily as a sysadmin — monitoring, troubleshooting, network diagnostics, and quick fixes for production servers.