majorwiki/index.md

created	updated
2026-04-06T09:52	2026-05-10T01:30

MajorLinux Tech Wiki — Index

A growing reference of Linux, self-hosting, open source, streaming, and troubleshooting guides. Written by MajorLinux. Used by MajorTwin.

Last updated: 2026-05-10 Article count: 110

Domains

Domain	Folder	Articles
🐧 Linux & Sysadmin	01-linux/	12
🏠 Self-Hosting & Homelab	02-selfhosting/	39
🔓 Open Source Tools	03-opensource/	10
🎙️ Streaming & Podcasting	04-streaming/	2
🔧 General Troubleshooting	05-troubleshooting/	47

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🐧 Linux & Sysadmin

Distro-Specific

• Linux Distro Guide for Beginners
• WSL2 Backup via PowerShell Scheduled Task
• WSL2 Instance Migration (Fedora 43)
• Wsl2 Rebuild Fedora43 Training Env

Files & Permissions

• Linux File Permissions and Ownership

Networking

• SSH Config and Key Management

Package Management

• Linux Package Management Reference: apt, dnf, pacman

Process Management

• Managing Linux Services: systemd and Ansible

Shell & Scripting

• Ansible Getting Started: Inventory, Playbooks, and Ad-Hoc Commands
• Bash Scripting Patterns for Sysadmins

Storage

• SnapRAID & MergerFS Storage Setup
• mdadm — Rebuilding a RAID Array After Reinstall

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🏠 Self-Hosting & Homelab

Cloud

• AWS S3 Cost Management

DNS & Networking

• Network Overview
• Pi-hole DoH / DoT Bypass Defense
• Pi-hole v6 Adlist Management via SQL
• Pi-hole v6 Group Management: Per-Client DNS Rules
• Tailscale for Homelab Remote Access
• Wake-on-LAN via Router SSH

Docker & Containers

• Debugging Broken Docker Containers
• Docker Healthchecks
• Docker vs VMs in the Homelab: Why Not Both?
• Self-Hosting Starter Guide
• Watchtower SMTP via Localhost Postfix Relay

Monitoring

• Deploying Netdata to a New Server
• Netdata SELinux AVC Denial Monitoring
• Netdata n8n Enriched Alert Emails
• Tuning Netdata Docker Health Alarms to Prevent Update Flapping
• Tuning Netdata Web Log Alerts

Reverse Proxies

• Setting Up a Reverse Proxy with Caddy

Security

• ClamAV Fleet Deployment with Ansible
• Fail2Ban Digest Mode — Fleet-Wide Quiet Alerts
• Fail2ban Custom Jail: Apache 404 Scanner Detection
• Fail2ban Custom Jail: Apache Bad Request Detection
• Fail2ban Custom Jail: Apache PHP Webshell Probe Detection
• Fail2ban Custom Jail: WordPress Login Brute Force
• Fail2ban: Enable the nginx-bad-request Jail
• Firewall Hardening with firewalld on Fedora Fleet
• Linux Server Hardening Checklist
• SELinux: Fixing Fail2ban grep execmem Denial on Fedora
• SSH Hardening Fleet-Wide with Ansible
• Standardizing unattended-upgrades Across Ubuntu Fleet with Ansible
• UFW Firewall Management
• wp-fail2ban Plugin Logpath on Debian/Ubuntu (auth.log, not syslog)

Services

• Claude Code Remote Control — Mobile Access to a Persistent Host Session
• Ghost Email Configuration with Mailgun
• Mastodon DB Maintenance — Statuses, Accounts, and VACUUM
• Mastodon Federation — Domain Blocks, Silencing, and FediSeer
• Mastodon Instance Tuning
• Mastodon — The --prune-profiles Trap and How to Recover
• Updating n8n Running in Docker

Storage & Backup

• rsync Backup Patterns

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🔓 Open Source Tools

Alternatives

• FreshRSS — Self-Hosted RSS Reader
• Gitea — Self-Hosted Git
• SearXNG — Private Self-Hosted Search

Development Tools

• Ventoy — Multi-Boot USB Tool
• rsync — Fast, Resumable File Transfers
• screen — Simple Persistent Terminal Sessions
• tmux — Persistent Terminal Sessions

Media & Creative

• yt-dlp — Video Downloading

Privacy & Security

• Vaultwarden — Self-Hosted Password Manager

Productivity

• rmlint — Extreme Duplicate File Scanning

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🎙️ Streaming & Podcasting

OBS Studio

• OBS Studio Setup and Encoding Settings

Plex

• Plex 4K Codec Compatibility (Apple TV)

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🔧 General Troubleshooting

• Ansible Check Mode False Positives in Verify/Assert Tasks
• Ansible Fails with Permission Denied While ssh <alias> Works (Host Alias Bypass)
• Ansible SSH Timeout During dnf upgrade on Fedora Hosts
• Ansible: Vault Password File Not Found
• Ansible Ignores ansible.cfg on WSL2 Windows Mounts
• claude-mem Silently Fails with Claude Code 2.1+ (Empty --setting-sources)
• Cron Heartbeat False Alarm: /var/run Cleared by Reboot
• Docker & Caddy Recovery After Reboot (Fedora + SELinux)
• Fantastical Google Sync Error Flood — Phantom Calendars Fixed via syncselect
• Fantastical MCP Server: Permission Denied on Launch (macOS Quarantine)
• Fedora Networking & Kernel Troubleshooting
• Gemini CLI: Manual Update Guide
• Ghost EmailAnalytics Lag Warning — What It Means and When to Worry
• Gitea Actions Runner: Boot Race Condition Fix
• ISP SNI Filtering & Caddy Troubleshooting
• macOS Repeating Alert Tone from Mirrored iPhone Notification
• MajorWiki Setup & Publishing Pipeline
• Obsidian Vault Recovery — Loading Cache Hang
• Ollama: ollama run with Piped Stdin Bypasses Chat Template + SYSTEM Prompt
• Ollama Drops Off Tailscale When Mac Sleeps
• Python smtplib: Missing Date/Message-ID Headers Break Mail Clients
• SELinux: Fixing Dovecot Mail Spool Context (/var/vmail)
• Ubuntu dist-upgrade Quarantines Third-Party Repos
• wget/curl: URLs with Special Characters Fail in Bash
• yt-dlp YouTube JS Challenge Fix (Fedora)

Docker & Containers

• Nextcloud AIO Container Unhealthy for 20 Hours After Nightly Update
• n8n Behind Reverse Proxy: X-Forwarded-For Trust Fix

GPU & Display

• LoRA adapter — GGUF conversion fails with 'config.json not found
• Qwen2.5-14B OOM on RTX 3080 Ti (12GB)

Networking

• Apache Outage: Fail2ban Self-Ban + Missing iptables Rules
• Fail2ban & UFW Rule Bloat: 30k Rules Slowing Down a VPS
• Mail Client Stops Receiving: Fail2ban IMAP Self-Ban
• Pi-hole AI Blocklist Blocks Claude Desktop (ERR_CONNECTION_REFUSED)
• Tailscale SSH: Unexpected Re-Authentication Prompt
• Windows OpenSSH Server (sshd) Stops After Reboot
• Windows OpenSSH: WSL as Default Shell Breaks Remote Commands
• firewalld: Mail Ports Wiped After Reload (IMAP + Webmail Outage)
• iOS Tailscale Clients Report HostName="localhost" — Breaks /etc/hosts Generators
• rsync over Tailscale: Hung in TCP Teardown After Transfer Completes

Security

• ClamAV Safe Scheduling on Live Servers
• Custom Fail2ban Jail: Apache Directory Scanning & Junk Methods
• Tuning Netdata web_log_1m_successful for Redirect-Heavy WordPress Sites
• Castopod: Stale Federated Avatar URLs After Remote Profile Updates
• Castopod Posts Don't Appear on Mastodon — Diagnosing the Federation Path

Storage

• mdadm RAID Recovery After USB Hub Disconnect

Systemd

• Systemd Session Scope Fails at Login (session-cN.scope)

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Recently Updated

Date	Article	Domain
2026-05-10	Claude Desktop MCP Mass-Disconnect After Blocking SSH Reboot	Troubleshooting
2026-05-10	Castopod Posts Don't Appear on Mastodon — Diagnosing the Federation Path	Troubleshooting
2026-05-08	Castopod: Stale Federated Avatar URLs After Remote Profile Updates	Troubleshooting
2026-05-08	Tuning Netdata web_log_1m_successful for Redirect-Heavy WordPress Sites	Troubleshooting
2026-05-07	Mastodon — The --prune-profiles Trap and How to Recover	Self-Hosting
2026-05-02	WSL2 Backup via PowerShell Scheduled Task	Linux
2026-05-02	SSH Config and Key Management	Linux
2026-05-02	Wake-on-LAN via Router SSH	Self-Hosting
2026-05-02	Tuning Netdata Docker Health Alarms to Prevent Update Flapping	Self-Hosting
2026-05-02	ClamAV Fleet Deployment with Ansible	Self-Hosting
2026-05-02	Fail2Ban Digest Mode — Fleet-Wide Quiet Alerts	Self-Hosting
2026-05-02	Mastodon Instance Tuning	Self-Hosting
2026-05-02	Ansible Check Mode False Positives in Verify/Assert Tasks	Troubleshooting
2026-05-02	ISP SNI Filtering & Caddy Troubleshooting	Troubleshooting
2026-05-02	Windows OpenSSH: WSL as Default Shell Breaks Remote Commands	Troubleshooting
2026-05-02	Windows OpenSSH Server (sshd) Stops After Reboot	Troubleshooting
2026-05-02	yt-dlp YouTube JS Challenge Fix (Fedora)	Troubleshooting
2026-04-30	wp-fail2ban Plugin Logpath on Debian/Ubuntu (auth.log, not syslog)	Self-Hosting
2026-04-30	LoRA adapter — GGUF conversion fails with 'config.json not found	Troubleshooting
2026-04-29	iOS Tailscale Clients Report HostName="localhost" — Breaks /etc/hosts Generators	Troubleshooting
2026-04-29	Python smtplib: Missing Date/Message-ID Headers Break Mail Clients	Troubleshooting
2026-04-28	Ubuntu dist-upgrade Quarantines Third-Party Repos	Troubleshooting
2026-04-26	Fantastical MCP Server: Permission Denied on Launch (macOS Quarantine)	Troubleshooting
2026-04-25	rsync over Tailscale: Hung in TCP Teardown After Transfer Completes	Troubleshooting
2026-04-25	Ollama: ollama run with Piped Stdin Bypasses Chat Template + SYSTEM Prompt	Troubleshooting
2026-04-24	Fantastical Google Sync Error Flood — Phantom Calendars Fixed via syncselect	Troubleshooting
2026-04-23	Pi-hole DoH / DoT Bypass Defense	Self-Hosting
2026-04-22	Pi-hole v6 Adlist Management via SQL	Self-Hosting
2026-04-22	Pi-hole v6 Group Management: Per-Client DNS Rules	Self-Hosting
2026-04-22	Mastodon DB Maintenance — Statuses, Accounts, and VACUUM	Self-Hosting
2026-04-22	Mastodon Federation — Domain Blocks, Silencing, and FediSeer	Self-Hosting
2026-04-22	Pi-hole AI Blocklist Blocks Claude Desktop (ERR_CONNECTION_REFUSED)	Troubleshooting
2026-04-21	Ansible Fails with Permission Denied While ssh <alias> Works (Host Alias Bypass)	Troubleshooting
2026-04-20	Claude Code Remote Control — Mobile Access to a Persistent Host Session	Self-Hosting
2026-04-19	AWS S3 Cost Management	Self-Hosting

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Writing Backlog

Topic	Domain	Priority	From Gap?
Docker Compose networking deep dive	Self-Hosting	High	No
Troubleshooting NVIDIA on Linux	Troubleshooting	Medium	No
Pi-hole setup and local DNS	Self-Hosting	Medium	No
Nextcloud setup with Docker	Self-Hosting	Medium	No

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Related

• MajorWiki Deploy Status — deployment status and update workflow