AAsep Sayyad3d 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 Sharma5d ago · 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 Sayyad4d ago · 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 asepsayyad007.hashnode.dev
AAsep Sayyad6d ago · 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
AAsep SayyadOct 16 · 20 min readWhy a Deleted Linux File Can Still Consume Disk SpaceYour root partition is at 100%, you ran rm on a 50GB log file, and df still reports zero free bytes. Here is how inodes, unlinked file descriptors, and kernel references keep ghost data alive, and how1Sasepsayyad007.hashnode.dev
EeServers UKOct 16 · 3 min readInfrastructure Engineering: Configuring IPMI and BMC for Out-of-Band ManagementWhen the primary operating system experiences a catastrophic failure, in-band management protocols like SSH become unreachable. Out-of-Band (OOB) management is facilitated by the Baseboard Management eservers-uk.hashnode.dev
