Blog
Notes and write-ups on infrastructure, security, and engineering.
A domain-by-domain study guide covering exam anatomy, compute, networking, storage, databases, and the cost/security/performance trade-offs the exam tests.
A practical walkthrough of subnetting fundamentals — CIDR, network/host bits, and how to work out network and broadcast addresses by hand.
Promiscuous vs. non-promiscuous NIC modes — what each captures at Layer 2 and why the distinction matters for traffic visibility.
Four parameters to weigh when sizing virtualized servers — memory, CPU, network, and storage — with practical rules of thumb for each.
A quick walkthrough of the classic LeetCode problem using ASCII arithmetic — O(n) time, O(1) space.
Beyond mkdir, cat, ls, and rm — the Linux commands that come up most often in SRE/DevOps interview assessments, with what each is (and isn't) good for.