A process with a stable workload shouldn't keep growing its resident memory. When it does, the first question isn't how much RAM is available. It's where the allocations stopped being released. On Linux, that answer isn't always obvious because the k...
AI is beginning to reshape how penetration testing workflows are organized. For years, the penetration tester’s workflow has been a labor-intensive ritual: scan, enumerate, research, exploit, and report. But new frameworks like Dark Moon are attempti...
When a security alert fires, the panic often sets in before the analysis. Many administrators instinctively reach for /var/log/auth.log or journalctl, but those logs tell only a partial story. They document successful logins and authentication attemp...
SELinux troubleshooting is a necessary skill for any system administrator. When a service fails despite correct file permissions and ownership, the immediate instinct is often to disable SELinux to confirm if the security policy is the bottleneck. Wh...
When a production server spikes at 99% CPU or the disk starts grinding, the knee-jerk reaction is usually to blame a bad code push or a runaway backup job. But if you’ve spent enough time in security incident response, you know that "performance issu...
Open ports have a way of accumulating over time. A test environment gets deployed and never removed. An administrative interface is exposed for troubleshooting and left in place. A database that was supposed to listen internally ends up reachable fro...
A compromised Linux server can continue running malware long after the initial intrusion. One of the most common persistence techniques is a malicious cron job that silently downloads payloads, restarts malware, or re-establishes attacker access ever...