Backend Survival Path
Build a CS base, then follow Linux and deployment practice.
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Recent Posts
Virtual Machines and Docker: A Heavy House and a Light Tent
This article explains the difference between virtual machines and Docker using the analogy of a house and a tent, and covers why Docker is light and fast because it shares the OS, along with the practical benefits of environment isolation.
Server Security Basics: Check the Locks Before You Open the Door
A step-by-step guide to Server Security Basics: SSH hardening (port change, key authentication), firewall (UFW), HTTPS (Let’s Encrypt), and Fail2Ban. A practical guide based on a solo developer’s real brute-force attack experience.
Linux CLI and Permissions: Surviving in a World Without a Mouse
This article explains why the Linux CLI and permissions matter through a new developer’s first deployment experience with SSH and MobaXterm, and offers practical tips for understanding file permissions and surviving in the terminal.
Servers and Linux: Can’t We Just Install Windows?
This article explains what servers and Linux really are, why servers use Linux instead of Windows because of GUI overhead and stability, and how the inefficiency of virtual machines builds up to the need for Docker.
REST API Design and DTO: A Gift Without Wrapping Is Risky
This article explains why REST API design and DTOs matter through examples of security issues and circular references, and introduces proper RESTful URL design and practical DTO naming strategies.
MyBatis vs JPA: There Is No Such Thing as a Bad Technology.
A practical story from the front lines of the MyBatis vs JPA debate. I cover how we solved JPA’s N+1 issue and built an efficient hybrid strategy that takes advantage of both tools.