Linux Systems Administration
Hardening, automation, observability, and performance tuning across distributions.
Linux systems administration · Networking · Cybersecurity
I design, build, and secure systems. I enjoy solving practical infrastructure problems and keeping things fast, reliable, and safe.
I'm Daniel (Dongin) Park, a tech enthusiast focused on operating systems, networks, and security. I love working close to the metal—tuning Linux, automating tasks, and building resilient environments.
Hardening, automation, observability, and performance tuning across distributions.
Designing and troubleshooting TCP/IP, routing, VLANs, and secure connectivity.
Threat modeling, least privilege, patching, and secure-by-default configurations.