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Training is essential in cybersecurity. I have accumulated many training decks through work and personal interest, and believe knowledge should be shared openly. This series publishes my own presentations to support everyone’s learning.

Behind the frequent data leaks lies society’s increasingly blurred understanding of privacy. Developer negligence, institutional apathy, and user compromise have woven a exposed online world. Security is no longer merely a technical issue.

A practical quick-start guide to Kscan, covering installation, common commands, use cases, and precautions.

My NAS originally ran a hacked Synology system, whose DSM web interface would freeze when two disks were read and written simultaneously. I considered TrueNAS, but its ZFS filesystem requires ECC memory; since the original board and CPU did not support ECC, I planned a hardware upgrade.

Built for efficiency and consistency—a cable-label formatting tool. Take a look.

In MinIO's community releases after 20250524, the open-source object-storage giant radically removed the core Web management console—deleting 110,000 lines of code. How can you manage MinIO with mc without a Web Console?

OpenSSH is a core component for remote server access and administration. Its open-source nature sometimes exposes security vulnerabilities, but also drives continuous improvement. Upgrading is the most effective response, yet many Linux servers run in isolated environments and cannot update directly over the network. This guide explains how to securely upgrade OpenSSH by compiling and installing it offline.

A guide to using Tencent Cloud EdgeOne to restrict access by region and allow only users in China, including Hong Kong, Macao, and Taiwan.

I often play the Civilization series with friends, and one final turn somehow becomes late at night. Although my friends live on the other side of the world, virtual networking lets us build a virtual LAN and enjoy seamless multiplayer. This article shares the technique.

A comprehensive list of high-risk ports to close and file types to block, covering remote access, databases, file sharing, executables, and web scripts to help complete security checks and improve protection.