SameOS ~/articles.md

Game Server and Home Server Guides

Practical guides for self-hosted game servers on Linux, safe updates, backups and recovery, plus file and image automation. Every article has Korean and English text, with code comments localized wherever configuration is involved.

Game Server Troubleshooting and Migration (5) 7 Days to Die Server Guides (1) Palworld Server Series (7) Minecraft Server Guides (6) Satisfactory Server & Tools (3) More Linux Dedicated Servers (4) Server Operations & Security (10) Image Cleanup & Tools (7) Files & Data in Practice (4)

Game Server Troubleshooting and Migration

Game Server Running but Friends Cannot Join? Seven Checks in Order NEW

Diagnose Minecraft Java and Palworld join failures through process readiness, TCP/UDP, Docker publishing, router rules, external tests and version matching.

Game Server Suddenly Stops: Diagnose Memory Pressure and Exit 137 NEW

Distinguish Docker Exit 137, confirmed OOM kills, Java heap exhaustion, container limits and shutdown timeouts before changing memory settings.

Game Server Disk Full: What to Check Before Deleting World Data NEW

Diagnose save failures through filesystem space, inodes, backups, logs and Docker mounts, then recover without treating world data as disposable.

Game Server Fails After Reboot: Read and Fix systemd Startup Errors NEW

Diagnose a Minecraft or Palworld server that starts manually but fails on boot through enablement, executable paths, service users, mounts and restart limits.

Move a Game Server to a New Computer: Saves, Configuration and Cutover NEW

Migrate a Minecraft or Palworld Linux dedicated server with matching builds, verified save paths, copy checks, permissions, external access and a rollback boundary.

7 Days to Die Server Guides

Self-Hosting a 7 Days to Die V3.1 Dedicated Server on Linux with Docker

Install the V3.1 stable server with Docker Compose and get friends connected. Covers sdtdserver.xml, SandboxCode, port forwarding, safe shutdowns, backups, and updates.

Palworld Server Series

Build Your Own Palworld Server, Part 6: Updating the Server on Patch Day

Steam updates the game but not your server, so friends suddenly cannot join. Update-on-restart vs pinned version tags, the backup - save - swap-the-tag procedure, and safe rollback.

Palworld REST API: the Complete Command Reference

All 12 endpoints (announce, kick, ban, save, shutdown) in one table - setup, auth, why it must never face the internet, and curl examples.

Palworld Server, Part 5: Vendor & Wanted-NPC Markers on the Map

Adding vendors and 164 wanted NPCs to the live map - data shape, coordinate conversion, vendor tooltips, and the three stacked reasons the markers refused to appear.

Build Your Own Palworld Server, Part 4: Power Control, Server Console, and a Live Map

What REST alone cannot do: settings editing, power on/off, unbroken console logs, and plotting players on a live map.

Build Your Own Palworld Server, Part 3: A Browser Admin Page With Zero-Dependency Node

Turn the Palworld REST API into browser buttons with zero external packages - keeping the admin password server-side is the key.

Build Your Own Palworld Server, Part 2: The Save Trap, Safe Shutdown, and Backups

The config file that loses its settings, the shutdown that silently discards progress, and automatic backups - traps from real operation.

Build Your Own Palworld Server, Part 1: Launch It on Linux With Docker

The series opener: hardware requirements, the compose file, and the port forwarding that lets friends join your home-hosted server.

Minecraft Server Guides

Using Minecraft 26.2 Server Management Protocol 3.0.0 Safely

Keep the JSON-RPC WebSocket API on localhost, then discover its schema and handle authentication, allowlists, and server readiness.

Install Minecraft Bedrock Dedicated Server on Ubuntu Linux

Official Bedrock Linux binary, UDP 19132, an allowlist, systemd, world backups, and a staged update path.

Minecraft Server RCON Setup and the Commands You Actually Use

Three lines to enable RCON, mcrcon usage, and the operator commands that matter - wired into backup scripts.

Build Your Own Minecraft Server, Part 3: Settings That Actually Reduce Lag

Why simulation distance beats view distance, why more RAM backfires, and the optimization mods that only need to live on the server.

Build Your Own Minecraft Server, Part 2: A Fabric Mod Server, Run With Docker

The Fabric loader, the file ownership trap, shutdowns that wait for the world save, RCON kept private, and world backups without stopping the server.

Build Your Own Minecraft Server, Part 1: A Java Server on Linux

The Java version trap, the eula step, the server.properties that matter, and a systemd unit that survives reboots.

Satisfactory Server & Tools

Satisfactory Dedicated Server HTTPS API Reference

One endpoint called by function name, the token flow (server.GenerateAPIToken), a 24-function table, and curl examples.

Self-Hosting a Satisfactory Dedicated Server on Linux with Docker

Running a dedicated server on your own Linux box: what each of the three ports does, the shutdown trap that eats your progress, memory limits, and installing mods with ficsit - based on months of uptime.

Satisfactory Factory Calculator - Auto-Planning Down to Alternate Recipes

Pick a node purity, miner tier, and belt, click a target part, and the whole production line is drawn with machine counts - official 1.2 game data, 89 alternate recipes, and cycle detection.

More Linux Dedicated Servers

Run a Valheim Dedicated Server on Linux With SteamCMD

Steam versus Crossplay, UDP 2456-2457, isolated data, systemd, permission lists, and recoverable world backups.

Build a Project Zomboid Build 42 Server on Linux

SteamCMD app 380870, an absolute cachedir, first boot, friends.ini, Workshop mods, and version-aware updates.

Build a Factorio Headless Server on Linux

Official headless package, save creation, server-settings.json, UDP 34197, mod parity, and staged upgrades.

Build a Terraria 1.4.5.8 Server on Linux

Official Linux server ZIP, serverconfig.txt, TCP 7777, clean saves, world backups, and release switching.

Server Operations & Security

Prove a Game Server Backup With a Real Restore Drill

Restore Minecraft, Palworld, or Satisfactory away from production, validate the archive, boot on another port, and perform a real join.

Home Server Auto-Recovery, Part 2: When the Kernel Is Fine but the Network Is Dead

A silently dead NIC triggers no panic and no reboot. A watchdog pings the gateway every minute and recovers in stages - USB rebind, driver reload, then reboot - with a reboot-loop guard.

Home Server Auto-Recovery, Part 1: Make the Kernel Reboot Itself After a Crash

The server died at night and stayed down for 3.5 hours. The real culprit was not the crash but the "never reboot after a panic" default - four sysctl lines cut the next outage to 35 seconds.

Checking Python Code Without Running It

Running submitted code with exec hands over your server. Using ast to find syntax errors, unused imports and dangerous calls without executing a line.

Passwordless Admin Login With Messenger One-Time Codes

Replace the fixed admin password with one-time codes delivered through a messenger webhook - expiry, single-use, and resend rules with PHP example code.

Why Bots Arrive Hours After You Register a New Domain

How Certificate Transparency logs expose new sites within hours, and how a small personal server should prepare for automated scanning.

Protect Private Files With PHP and Nginx

Separate file folders from the public root and serve files only through an authenticated router.

Server Status Webhook Alerts With a Shell Script

Send CPU, memory, and disk reports to a messenger using only top, free, and df.

Avoiding Common cron Schedule Mistakes

Frequent cron expression mistakes and safe scheduling rules for small servers.

How to Safely Load Test a Small PHP Site

A measured way to check concurrency, response time, and error rate.

Image Cleanup & Tools

What Months of Running an Image Collector Taught Me

Three rewrites on the way to 150,000 files: duplicates filenames cannot catch, re-processing everything each run, and dying on the first failure.

Find Duplicate Images With Python and Print Delete Candidates

A practical SHA-256 example for finding identical images and reviewing candidates before deletion.

Inspect Image Dimensions and Aspect Ratio in the Browser

How to check width, height, ratio, megapixels, and thumbnail estimates without uploading files.

Choosing WebP Conversion Settings

How to pick quality, max width, and output format, and convert images in the browser.

Check EXIF Privacy Before Sharing Photos

How capture time and GPS location stay inside photos, and how to remove them.

Bulk Thumbnail Generation With Python Pillow

An idempotent batch thumbnail script covering RGB conversion and skip rules.

Find Duplicate Images and Files With SHA-256 Hashes

Why hashes are safer than filenames for checking identical files.