AAsep Sayyad1d ago · 14 min readStop Using cat for Everything: 9 Better Ways to Read Linux FilesPractical tools to inspect, page, slice, and debug files without freezing your terminal Running cat /var/log/nginx/access.log on an active server is an unforced error that most engineers make once befasepsayyad007.hashnode.dev
AAsep Sayyad2d ago · 18 min readHow I Troubleshoot a Linux Server That Suddenly Loses Network AccessA systematic Layer 1 to Layer 4 diagnostic guide for recovering isolated production machines through an out-of-band console without rebooting blindly. An SSH session freezes in the middle of a command1asepsayyad007.hashnode.dev
AAsep Sayyad6d ago · 23 min read What Really Happens When You Run curl google.com on Linux?A step-by-step breakdown of shell parsing, ELF linking, glibc resolver queries, non-blocking TCP handshakes, socket buffers, and the infamous 301 redirect. You type curl google.com in your terminal a12Casepsayyad007.hashnode.dev
AAditya SharmaOct 23 · 8 min read(Day 49) Task : Launching an EC2 Web Server !I launched an Ubuntu server with Nginx inside my own VPC. My first SSH attempt failed, and the cause was one wrong rule. Tags: AWS, ec2, DevOps, cloud, nginx, beginners This is Phase 3 of my StudentHugkv-devops.hashnode.dev
AAsep SayyadOct 23 · 18 min readScaling Next.js on a $0 VPS: 25ms Cloudflare Edge Shield GuideHow combining lightweight /api healthchecks, Docker container limits, and Cloudflare edge caching protects dynamic servers from traffic spikes. The alert triggered at 2:40 PM on a Friday. A technical 2asepsayyad007.hashnode.dev
AAsep SayyadOct 22 · 18 min readTuning the Linux Kernel for 10x Traffic: How We Prepared a Modest Cloud Server for the Hug of DeathSomaxconn, SYN backlogs, TCP syncookies, and finding our breaking point with stepped Autocannon load benchmarks. The alert hit our channel at 11:14 AM on a Tuesday. Our product had just been picked upasepsayyad007.hashnode.dev
AAsep SayyadOct 20 · 19 min readThe Mystery of the Dying 1GB ServerHow an unsuspected GUI daemon, zero swap, and unrotated Docker logs pushed our cloud node into kernel panics (and how we reclaimed 500MB of free RAM). The incident report pinged my phone at 02:40 AM. asepsayyad007.hashnode.dev
AAlbertOct 18 · 3 min readI turned on Secure Boot and my Ubuntu laptop stopped bootingI have an old HP EliteBook Folio 9470m (2014, BIOS F.48) running Ubuntu. I had just upgraded to the latest version Ubuntu 26.04.1 LTS resolute, and I thought I would turn on Secure Boot while I was atahlbert.hashnode.dev
AAsep SayyadOct 18 · 19 min readHunting the Ghost in the Machine: Why Our Linux Servers Kept Spiking to 100% CPU (And Why the Monitoring Script Was Lying)A deep dive into CPU delta calculations, isolated Docker metric samplers, and disabling rogue systemd timers. The Telegram notification arrived at 03:14 AM. ALERT: [prod-app-02] CPU utilization is aasepsayyad007.hashnode.dev
AAsep SayyadOct 17 · 15 min readZero-Trust Linux: How I Hardened 4 Cloud Servers Against Brute-Force Attacks in Under an HourNo passwords, no root login, and aggressive Fail2ban jails: transforming noisy, attacked ports into impenetrable fortresses. Spin up a fresh Linux virtual machine on any major cloud provider, assign iasepsayyad007.hashnode.dev
