Zero Trust security model primer: built on "never trust, always verify" and dismantles traditional VPN-equals-trusted perimeter thinking. Six pillars explained — identity (MFA/SAML), device health checks, least-privilege RBAC, microsegmentation mTLS, continuous trust scoring, observable audit trail — with implementation roadmap.
Tune Linux across CPU/mem/IO/net: perf for CPU sampling, bpftrace one-liners for kernel tracepoints, BCC classics biolatency/offcputime to pinpoint production bottlenecks with real incident methodology.
Full K8s Pod state machine Pending→Terminated, PostStart/PreStop hooks, Init Container dependency guarantees, Sidecar patterns (istio-proxy, log collectors), and zero-downtime graceful termination configs.
Complete Go native concurrency guide: lightweight goroutines, CSP-style channels, sync.WaitGroup, Context cancellation, worker pool patterns, and goroutine leak prevention.
Master Rust's most unique concepts: ownership rules, mutable/immutable borrowing constraints, lifetime annotations. Compile-error examples + fixes to think like the Borrow Checker for safe zero-cost code.
Node.js performance diagnostics: clinic.js one-click reports, reading flamegraphs for hot functions, event-loop blockers, memory leak stacks to pinpoint CPU/memory bottlenecks.
Master advanced Git: Interactive Rebase for history cleanup, Cherry-pick selective commit porting, Bisect binary-search bug regression hunting, reflog and reset recovery.
Master PostgreSQL optimization: EXPLAIN ANALYZE plans, choosing index types (B-tree/GIN/BRIN), updating statistics, tuning joins, and partitioned table design for maximum performance.
Deep dive into Docker Compose production best practices: multi-stage builds, health checks, resource limits, logging, network isolation, and secrets management for reliable container deployments.
