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Travel1

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South Korea Travel1

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50 Autumn Foliage Destinations in South Korea: A Brief Regional Guide

Current Issues63

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Crypto Briefing1

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Crypto briefing, October 25, 2026: seven stories on Korea's crypto tax, Bitcoin and wallet security

IT Briefing1

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IT briefing, October 25, 2026: seven stories on security, AI and Windows

AI and GPU News7

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Ubuntu Myna Speech-to-Text Preview: Test Local Processing and Language Quality
Agent Compute Engine Announced: The Customer Preview Is Still Ahead
Confidential G4 Reaches GA: What GPU Data-in-Use Protection Covers
Google Distributed Cloud Expands Air-Gapped AI: Separate GA from Preview
llm-d 1.0: Why Context-Aware Routing Matters for LLM Serving
TorchTPU Goes Open Source: A New PyTorch Path to TPUs
Claude on Google Cloud Adds a Deployment Choice: Check the Data Processor

Bitcoin31

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Bitcoin this week: the October FOMC schedule and signals
Bitcoin falls below $81,500 as the technology-stock selloff spreads
CFTC and CME dispute the US treatment of Bitcoin perpetual futures
SpaceX–Tesla merger talks put existing Bitcoin holdings in focus
A Bitcoin wallet dormant since 2013 moves 411 BTC
Bitcoin put trading rises: hedging demand is not a certain price forecast
Bitcoin volatility approaches Nvidia’s: comparing 90-day realized swings
Robinhood sees growing Bitcoin prediction-market demand
Sazmining offers Proto hashboards: separating hardware and operating costs
Nscale loses a UK Microsoft project as power delays test the mining-to-AI pivot
Standard Chartered launches direct Bitcoin trading for eligible UAE clients
China seeks confiscation of 61,800 BTC: legal claims are not market sales
Deutsche Bank targets an Asian expansion of crypto custody
Standard Chartered signs definitive agreements to acquire Zodia Custody
German Sparkassen begin Bitcoin trading in their banking app
Super League shareholders approve Metaplanet’s proposed 2,100 BTC investment
Strive reaches 36,818 BTC: separating the new purchase from the weekly total
Strategy adds 267 Bitcoin while repurchasing STRC preferred shares
JPMorgan models 10% annual Bitcoin returns: reading the assumptions
Mt. Gox extends repayments to 2027: a deadline is not a distribution freeze
Blockstream expands institutional Bitcoin consulting from Lugano
NIP Group agrees to acquire another 4.47 EH/s of Bitcoin mining assets
Bitcoin hashrate recovers, but the price signal needs context
Glassnode’s $87,700 Bitcoin cost basis: reading a potential resistance zone
Do Bitcoin ETF flows lead prices? DWF Labs studies 694 sessions
Thailand’s spot crypto ETF framework starts without a formal application
Franklin registers Bitcoin DRIP ETFs that redirect stock dividends
BlackRock files for PBIT: what Bitcoin downside protection means
Switzerland approves its first retail spot Bitcoin ETF
US spot Bitcoin ETFs lose $635 million in one session
Bitcoin Core accelerates fixes for easily discoverable vulnerabilities

Cloud and Networking4

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Cloudflare Origin Range Requests Improves Partial-File Caching
Project Tessera: Understand the Scope of Open Integrated HSMs
Amazon ECS Gateway Separates Ingress Management from Application Services
Amazon S3 Comes to Vercel: Check Permissions Before Provisioning

Security Updates9

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AWS Continuum Reaches GA: From Vulnerability Findings to Reviewable Fixes
GitHub Public Monitoring Expands: Closing an Alert Does Not Revoke a Token
Ubuntu 26.10 curl Security Update: Include libcurl Consumers in the Review
Eight eMudhra Intermediate Certificates: Check Trust Stores Beyond the Browser
Cloudflare WAF Adds Request-and-Response Inspection: Blocking Is Not Rollback
Cloudflare PQ GeoKey Manager Enters Closed Beta: Keys Are One Location Boundary
Docker Hub PAT Reassignment Flaw: Separate the Fix Date from the Impact
Microsoft Expands Local AI Agent Discovery: Inventory Is Only the Start
ConnectWise App Identity Abuse: Review Microsoft 365 Service Principals

OS and Kubernetes5

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Python 3.15.1, 3.14.9, and 3.13.17 Security Releases: Check Existing venvs
Kubernetes Node Swap: Evaluate Density Against Tail Latency
Headlamp’s Kueue Plugin: Check Admission Before Investigating Pending Pods
Kubernetes cgroup v2 Migration: Avoid a kubelet Startup Failure After Upgrade
Ubuntu 26.10 Arrives: Review Automation After the Rust coreutils Transition

Developer Tools5

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GitHub Stacked PRs Reach GA: Design Review Boundaries and Merge Dependencies
GitHub Package Firewall Public Preview: Start with npm and Download Paths
GitHub CLI Previews Expiring OAuth Tokens: Find Scripts That Cache Credentials
Enterprise GitHub App Installations Reach GA: Review Classic PAT Automation
Rust 1.99.1 Fixes Regressions in FFI bool, UEFI, and macOS Linking

IT Foundations27

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Virtualization Basics1

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Virtual Machines and Containers: Architecture, Security, Deployment and Recovery

Enterprise Virtualization1

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Eight Enterprise Virtualization Platforms and How to Compare Them

Storage Basics1

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SAN and NAS Explained: Protocols, Performance, Redundancy and Backups

Git and GitOps24

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Git Setup4

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Repositories, Commits and the Role of GitOps
Install Git on Windows 11: PowerShell and Git Bash
Install Git and Prepare an Account on Rocky Linux 9
Install Git and Prepare a Repository on Ubuntu 24.04

History and Branches5

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Make a First Commit with add, commit, status and diff
Read History with HEAD, Graphs, diff and bisect
Choose restore, reset or revert Before Undoing Changes
Create and Merge Branches: switch and Fast-Forward
Resolve Conflicts with the Common Ancestor and a Three-Way Merge

Collaboration and Releases4

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Work with Remotes: clone, fetch, pull and push
Team Branching and Pull Requests: Merge or Rebase
Use Tags and Releases to Identify a Deployment
Review gitignore, Line Endings, LFS and Secrets

Local Git Servers3

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Build a Local Git Server with Bare Repositories and SSH
Run a Local Gitea Server with Docker Compose
Back Up and Restore Gitea Beyond the Repository Files

CI and CD3

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Add GitHub Actions CI and Stop on Test Failures
Connect Gitea and Jenkins: Credentials and Jenkinsfile
Plan CD: Approval, Artifact Promotion and Image Digests

GitOps and Operations5

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Apply GitOps Principles and Separate App and Deployment Repositories
Deploy with Argo CD: Installation, Projects and Git Access
Review Auto-Sync, selfHeal, prune and Git Revert
Manage Secrets with SOPS and age
Operate Git, CI/CD and GitOps: Diagnose and Recover

Network5

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Networking Basics2

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NAT Explained: SNAT, DNAT, One-to-One NAT and Port Forwarding
OSI and TCP/IP Layers: Follow Data from an Application to the Wire

Container Networking3

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Build the Cluster and Connect Calico
Service DNS and Access from Windows
RBAC, NetworkPolicy and Pod Permissions

Nutanix4

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Move Migration1

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Nutanix Move: Fix ESXi Host Unreachable Errors with DNS

AHV and Virtualization3

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Install NGT on a Nutanix Linux VM and Verify Connectivity
Deploy Rocky Linux and Ubuntu Cloud Images on AHV: QCOW2 Passwords and cloud-init
Manually Migrate a Linux VM from VMware to Nutanix AHV

Windows5

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Windows 11 Lab Environment3

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Prepare Windows 11, VMware and Rocky Linux
Install WSL2 and Understand Files and Networking
Understand Docker Desktop, Containers, Volumes and Ports

Development Tools2

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Install Python and Create Project Environments
Install Node.js and npm and Check Executable Paths

Linux35

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CI/CD and Automation4

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Jenkins4

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Install Jenkins LTS on Ubuntu: Java, Setup and Access
Install Jenkins on Rocky Linux 9: DNF, SELinux and Firewall
From a First Job to a Jenkinsfile: Git, Agents and Pipelines
Six Uses: Image Builds, Kubernetes Deployment and Operations

Development Environments7

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Python Environments7

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Install Python Packages Offline: Prepare Wheels and Dependencies
Choose venv, uv or conda on Linux
Use uv for Python, Dependencies and Lockfiles
Use conda, Miniforge and Jupyter Kernels
Structure a Web Project with src, uv and Tests
Plan pandas, Jupyter, CPU and GPU Environments
Structure OCR Tools, Language Data, APIs and Workers

Network Configuration7

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Use the Linux ip Command: Practical Examples and Differences from ifconfig
Build a DNS Server on Rocky Linux 9 with BIND: Forward and Reverse Zones
Configure Static Routes on Ubuntu with Netplan
Configure Static Routes on Rocky Linux with nmcli
Set a Static IP on Rocky Linux 9 with nmtui and nmcli
Set a Static IP on Ubuntu 24.04 with Netplan, DNS and SSH Recovery
Configure Ubuntu 26.04 Networking: Static IP, nmtui and Two NICs

Storage Management3

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Fix No Space Left on Device When Linux Still Shows Free Space
Expand a Linux Root Filesystem with LVM, XFS or ext4
Expand a Linux Root Partition Without LVM: growpart and resize2fs

Rocky Linux3

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Prepare Windows 11, VMware and Rocky Linux
Rocky Linux IP, Time and Kernel Settings
How to Open a Port with firewalld on Rocky Linux 9

Container Runtime3

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Diagnose a Restarting Docker Container with Logs and Exit Codes
Install containerd 2.x and kubeadm
Fix docker ps Permission Denied on Linux: Docker Group and Daemon Checks

System Operations8

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PostgreSQL 18 on Rocky Linux 9: Native and Docker Installation, Roles, and App Access
Build a Local chronyd Time Server on Rocky Linux 9
Build a Local Package Repository for Rocky Linux 9 and Ubuntu 24.04 or 26.04
Use cloud-init to Configure a VM on First Boot
Start with Ansible: SSH Access and a First Playbook
Run Ollama Models on Linux: Installation, Service and Local API
Use systemd: Create, Edit and Remove Services and Read journalctl Logs
Diagnose Pod Failures and Drain a Node

Kubernetes12

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Lab Environments1

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Prepare Windows 11, VMware and Rocky Linux

Cluster Installation3

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Rocky Linux IP, Time and Kernel Settings
Install containerd 2.x and kubeadm
Build the Cluster and Connect Calico

Application Deployment and Networking2

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Deploy an Application and Perform a Rolling Update
Service DNS and Access from Windows

Storage and Security2

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Keep Files with a Local PV and PVC
RBAC, NetworkPolicy and Pod Permissions

Troubleshooting and Operations4

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Find the Cause of Kubernetes ImagePullBackOff
Diagnose Pod Failures and Drain a Node
Restore etcd and Application Files; Apply Patch Upgrades
Troubleshooting CoreDNS Resolution Failures in Kubernetes

AI38

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Local LLM37

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Getting Started and Model Selection10

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Explore a Tokenizer: Korean and English Token IDs and Embeddings
Run Ollama Models on Linux: Installation, Service and Local API
What to Check Before Running a Local LLM
Install Ollama on Windows 11 and Run a Model
Choose a Model for Your Computer
Read CPU, GPU and VRAM Specifications
Tokens, Context, Quantization and Memory Use
Move Model Storage and Check Offline Operation
Use GGUF Models and the API in LM Studio
How to Estimate GPU VRAM for Local LLM Inference

Development Environments and APIs10

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Find Missing Ollama Models in Open WebUI
Run vLLM on RTX: Rocky Linux 9 and Ubuntu 24.04 or 26.04
Install Python and Create Project Environments
Install Node.js and npm and Check Executable Paths
Install WSL2 and Understand Files and Networking
Understand Docker Desktop, Containers, Volumes and Ports
Set Up Web Chat with Open WebUI and Ollama
Call the Ollama API from Python
Write Prompts with Clear Source Text and Constraints
Validate Structured Responses with JSON Schema

Document Search and RAG3

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Search Documents with Embeddings and Cosine Similarity
Build RAG Answers from Retrieved Documents
Build an Evaluation Sheet for Models and RAG

Agents and Cloud7

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Understand Hermes Models and Chat Templates
Connect Hermes Agent and Review Tools and Memory
Build an Agent Loop with an Inventory Lookup Tool
Install OpenClaw and Check Its Gateway
Check OpenClaw's Ollama Endpoint and Tool Calls
Use OpenRouter and Check Cost and Data Routing
Decide Which Requests Stay Local or Use the Cloud

Performance and Operations7

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Download and Archive safetensors Models for an Offline Environment
Measure Loading, First Response and Generation Speed
Compare GGUF and CPU/GPU Options in llama.cpp
Understand LoRA, QLoRA and a Small Training Script
Review API, Log and Tool Permissions
Back Up and Restore a Document Q&A Tool
Ollama Not Using Your NVIDIA GPU on Linux: What to Check

GPU and AI Infrastructure1

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NVIDIA GPU Comparison: Workstation and Server Specs, vGPU, MIG and Prices

Security Issues2

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Vulnerabilities and Response2

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OpenJDK CVEs: Windows and Linux Checks and Remediation
PHP2Shell: Check PHP Runtimes and Apply Security Fixes

Series guidesKubernetes Lab · 10 parts Local LLM · 30 parts Git and GitOps · 24 parts

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Linux System Operations

Build a Local Package Repository for Rocky Linux 9 and Ubuntu 24.04 or 26.04

Prepare RPM and APT repositories, publish their metadata and signatures, and verify package sources from the client system.

2026.10.23
Read article →: Build a Local Package Repository for Rocky Linux 9 and Ubuntu 24.04 or 26.04
Kubernetes Cluster Installation

[Kubernetes Lab 02] Rocky Linux IP, Time and Kernel Settings

Set stable addresses and hostnames, synchronize time, and check kernel and network settings on the three Rocky Linux lab VMs.

2026.10.23
Read article →: [Kubernetes Lab 02] Rocky Linux IP, Time and Kernel Settings

Linux, networking, Kubernetes and local AI

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