I work directly on live Linux server incidents — from compromised systems and malware infections to high CPU usage, service crashes, and production outages. My focus is fast diagnosis, controlled recovery, and long-term hardening.
With nginx's recent disclosure of multiple CVEs in the 1.27.x–1.30.x line (HTTP/2 request injection, buffer overflows in rewrite/SCGI/uWSGI/charset modules, HTTP/3 address spoofing, and a use-after-free in OCSP resolver), a lot of admins are stuck on Ubuntu's
CRITICAL: A remote code execution vulnerability discovered in NGINX this week has been silently lurking in production for 18 years. It's pre-auth, remotely exploitable with a single HTTP request, and a working proof-of-concept exists. If you run NGINX anywhere — Plus, Ingress Controller, Gateway Fabric, App Protect — patch immediately.
A misconfigured /etc/network/interfaces on a remote Proxmox host means console-only recovery. Most of these gotchas don't surface during normal operation — they surface during dist-upgrade, after a reboot, or the first time a VM tries to migrate. Here's the list, ordered roughly by how often
The engineering team behind Terraform by HashiCorp has introduced several major improvements to HCP Terraform and Terraform Enterprise focused on reducing operational overhead, improving governance, and strengthening infrastructure security across the entire lifecycle. The latest updates include: * Billable resource analytics (GA) * Project-level remote state sharing (GA) * Module testing for dynamic
fail2ban works, but it scales badly. Every banned IP becomes a discrete iptables -A rule, and at a few thousand entries the rule chain becomes the bottleneck — every packet walks a linear list. nftables sets fix this with O(1) lookup, native timeouts, and atomic updates. No daemon required for
Hetzner's dedicated server networking trips up everyone the first time. The gateway isn't in the same subnet as the IPs you're assigning. Additional IPs are routed individually as /32s, not as a contiguous on-link subnet. The upstream switch MAC-filters by default, so naïve bridged
Most sysadmins reach for AppArmor or SELinux when they want to confine a service. Both work, both have learning curves, and both expect either pre-shipped policies or substantial custom-rule writing. Meanwhile, systemd has shipped — for years — a sandboxing toolkit that gets you most of the protection with maybe 25 lines
Published: May 8, 2026 Affected Products: cPanel & WHM, WP Squared (WP2) Patch Status: Available — apply immediately Context: Second emergency Technical Security Release (TSR) within 10 days Executive Summary WebPros (cPanel) released a coordinated patch on May 8, 2026 at 12:00 EST addressing three distinct vulnerabilities affecting cPanel &
Published: May 8, 2026 Risk Level: CRITICAL (affects 9+ years of kernel versions) Status: Unpatched on most distributions; mitigations available Executive Summary A newly disclosed Linux kernel local privilege escalation vulnerability chain, dubbed "Dirty Frag" and assigned CVE-2026-43284 and CVE-2026-43500, enables attackers with local access to obtain root
A new security vulnerability has been identified in cPanel & WHM through a trusted disclosure source. The cPanel engineering team is actively developing patches and has issued an early advisory so administrators can prepare servers ahead of patch availability. To protect customers prior to patch release, full technical details will
Use zstd for everything new. It's faster on both ends, compresses better at equivalent CPU cost, and is multi-threaded by default. Stick with gzip/tar.gz only when you need maximum portability to ancient/minimal systems (older than ~2018). Quick Reference Table Dimension gzip (tar.gz) zstd (tar.
Digital Certificates and the Chain of Trust When a browser opens an HTTPS connection, the server hands over a public key. Before a single byte of encrypted application data flows, the client has to answer one question: is this public key actually trustworthy? The mechanism that answers it — X.509