Dinko
Korunić
Systems architect and security consultant. Thirty years across the Unix and Linux stack.
I work at the layer where most consultants stop: kernel, syscalls, storage, eBPF.
Where I’m most useful
Now Principal Cloud Architect at HAProxy Technologies, and board member at InfoMAR.
Pathology other teams can’t isolate
Memory, I/O, syscall and storage-layer problems, diagnosed and fixed.
Storage at scale
SAN/NAS, Ceph, Isilon, SolidFire. Single to multi-petabyte.
Security
Architecture, hardening, forensics, penetration testing.
years on Unix and Linux
Cloud and virtualization
KVM, Xen, Hyper-V, OpenStack, CloudStack, containers.
Systems programming
C, Rust, Go and Python, close to the kernel.
No tolerance for failure
Two decades of security and systems integration for the Croatian President’s Office, the Croatian National Bank, government bodies, private banks, ISPs and high-traffic web infrastructure.
Unix and Linux articles in Mrež@ and BUG
The whole lineage
The BSDs and Linux, then Solaris, AIX, IRIX and Tru64 in production.
Certified
LPIC-3 300 and 304, LPIC-2, LPIC-1, SUSE CLA.
technical lectures on security and internals
Open source
- betteralignGo · 1,090 stars. Detect and fix suboptimal struct field layout in Go: reduces padding and GC pointer bytes, rewrites files while preserving comments.
- iSMCGo · 212 stars. Apple SMC CLI for macOS — temperature, fan, battery, power, voltage and current sensors on Intel and Apple Silicon (M1–M5), with table, JSON and InfluxDB output.
- pktstat-bpfC · 152 stars. eBPF-based Ethernet traffic monitor using TC, XDP, kprobes and cgroups.
- pktstatGo · 100 stars. Lightweight per-connection network traffic monitor for IPv4/IPv6, TCP/UDP/ICMP — AF_PACKET on Linux, libpcap elsewhere.
- e-dnevnik-botGo · 68 stars. Grade/exam alerting bot for the Croatian e-Dnevnik school system.
- findlargedirRust · 66 stars. Fast Rust CLI to find "black hole" directories with millions of entries, without reading them.
- dnstraceGo · 53 stars. DNS query tracing and analysis tool.
- uptime_hackC · 43 stars. Small Linux kernel module that tampers with reported uptime.
- axfr2hostsGo · 15 stars. Fetches DNS zones via AXFR and dumps them in Unix hosts format.
- gopherdGo · 15 stars. Minimal PID 1 init and service supervisor for Docker/Kubernetes containers, including rootless.
- minifindRust · 11 stars. Fast, parallel find(1) reimplementation in Rust: a work-stealing directory walker with find-compatible predicates.
- astro-recommenderGo · 10 stars. What to image tonight: ranks deep sky targets and comets for your location, weather, Moon and telescope.
Also long-running contributions to Hybserv 2, PAM S/Key, slrn and mrtg. All repositories on GitHub
Talks and writing
Slides from SRCE, CARNet, InfoMAR, DORS/CLUC, FSec and others, then manuals and papers, 1996–2026. Mostly in Croatian.
Filter by year
Talks browse /pdf/
- Korunic eBPFSlides20263.5 MB
- Korunic eBPF2Slides20262.8 MB
- ITshowoff DinkoSlides20210.6 MB
- Sigurnost Web aplikacija sa HAProxy LB omSlides20212.1 MB
- VSS kriminalitetSlides20213.6 MB
- VSS2014 kriminalitetSlides20143.6 MB
- CUC2011 DinkoSlides20111.1 MB
- DORS2011 DinkoSlides20111.0 MB
- FSEC2011 DinkoSlides20112.6 MB
- CARNet SNMP ZenOSS RadionicaSlides20100.2 MB
- CUC2010 DinkoSlides20100.7 MB
- DORS2010 DinkoSlides20100.7 MB
- T Mobile DNSSlides20090.6 MB
- Sigurnost na Internetu IIISlides20060.3 MB
- Tru64 AlatiSlides20060.4 MB
- Kernel kompiliranjeSlides20051.6 MB
- Sigurnost na Internetu IISlides20050.6 MB
- Tru64 MrezaSlides20050.5 MB
- Tru64 PerformanseSlides20050.2 MB
- Linux sigurnostSlides20040.3 MB
- NetfilterSlides20041.9 MB
- Sigurnost na InternetuSlides20040.6 MB
- Bind 9Slides20031.8 MB
- Bind jednostavnijeSlides20030.8 MB
- CN DebianSlides20031.1 MB
- CN Debian ISlides20032.4 MB
- RCS CVSSlides20031.1 MB
- Servisi sigurnostSlides20030.7 MB
- Sigurnost poste PGPSlides20033.2 MB
- WebalizerSlides20031.4 MB
Writing browse /pdf2/
- Korunic Prikupljanje i analiza DNS prometaPaper20090.8 MB
- DNS prirucnikPaper20081.0 MB
- MTA testiranjePaper20060.5 MB
- Solaris vs LinuxPaper20061.0 MB
- OOSimscriptPaper20050.2 MB
- CAR6Net bind9Paper20040.2 MB
- CAR6Net kernelPaper20040.3 MB
- CAR6Net qpopperPaper20040.1 MB
- CAR6Net sendmailPaper20040.1 MB
- ProdukcijaPaper20041.0 MB
- C LexerPaper20030.2 MB
- CARNet Debian x86 II uputePaper20030.7 MB
- Korunic Memorije MOPaper20031.0 MB
- Korunic Zemris seminarPaper20030.3 MB
- Solaris 8 uputePaper20031.8 MB
- Zesa elaboratPaper20030.2 MB
- OS2seminar BlowfishPaper20020.2 MB
- OS2seminar DiffieHellmanPaper20020.2 MB
- Maturalna radnja matricePaper19960.3 MB
Night sky
Deep sky from a backyard in Zagreb
City skies, narrowband filters
per exposure, by the thousand
The Bubble Nebula