Java command line tools, JPMS, CDS, IDE tips, networking/security properties, Gradle & Maven cheat sheet.

OpenJDK container images, Docker commands, JVM ergonomics in containers, sandboxing, multi-arch and K8S tips.

OpenSSL & keytool cheat sheet, PKCS#12 truststores, self-signed certs, mTLS, GPG and TLS debugging.

Flight Recorder, JMC, flame graphs, heap/thread dumps, GC logging and system health tools.

Process/CPU/memory tools, sysctl tuning, proc filesystem, git aliases, curl, dig, ssh and tcpdump cheat sheet.

Install, configure and use Tmux: sessions, windows, panes, key bindings and modifier keys.

Kotlin compiler options, native image, code style comparisons, and math/diagram rendering samples.

Curated reading list: Java/Loom, virtual threads, concurrency, and database design links.