linux) sudo
sudo 1. Acquire root privileges via the setuid bit 2. Identify the executor...
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network) VPN
VPN Virtual Private Network "A technology that connects distant networks as...
golang) unexported struct pointer embedding
Prevents ==arbitrary creation of structs== from external packages, enforcin...
Pattern) IIFE
- When a **Lock** is required in the initialization logic within a function
Pattern) Local Helper Closure
- A technique of assigning an **anonymous function** that is only used insi...
K8s) kube-controller-manager
**Core Initialization (run function)** - `CreateControllerContext` - Create...
linux) setuid/gid & sticky bit
- SetUID: When executing a file, the process runs with the **file owner's I...
linux) hard link & soft link
- Creates another name that points to the same file. - Even if the original...
java) Value annotation and classpath
- Tomcat adds `WEB-INF/classes/` (a path on the actual file system) of the ...
java) http session object
- Stores data as key/value pairs using ConcurrentHashMap(attributes). - Cre...
java) io.spring.dependency-management
📝 Manages the ==versions== of Spring Boot related dependencies --- `spring-...
java) logger declaration method
private static final Logger logger = LoggerFactory.getLogger({{class name}}...
linux) file descriptor
- Managed by the kernel for each process. - Default file descriptors - 0: s...
CS) Mark & Sweep algorithm
- Object Creation: Mark as 0 - Graph traversal from all roots: Mark as 1 In...