Marcus Summers
ca123b0312
Documents the gotcha hit during the 2026-05-06 update.yml refactor:
the second-positional-argument back-reference form of regex_search
('\1') doesn't reliably select capture groups when used inside
set_fact. The fix is to match the broader substring and use
.split()[0] (or [-1], etc.) to peel off the value, with a default()
bridge for the no-match case.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
53 lines
3.2 KiB
Markdown
53 lines
3.2 KiB
Markdown
---
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created: 2026-03-15T06:37
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updated: 2026-05-02T17:50
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---
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# 🔧 General Troubleshooting
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Practical fixes for common Linux, networking, and application problems.
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## 🖥️ GPU & AI
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- [Qwen2.5-14B OOM on RTX 3080 Ti (12GB)](gpu-display/qwen-14b-oom-3080ti.md)
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- [LoRA adapter — GGUF conversion fails with 'config.json not found'](gpu-display/lora-adapter-gguf-conversion-fails.md)
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## 🌐 Networking & Web
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- [Apache Outage: Fail2ban Self-Ban + Missing iptables Rules](networking/fail2ban-self-ban-apache-outage.md)
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- [Mail Client Stops Receiving: Fail2ban IMAP Self-Ban](networking/fail2ban-imap-self-ban-mail-client.md)
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- [firewalld: Mail Ports Wiped After Reload](networking/firewalld-mail-ports-reset.md)
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- [Tailscale SSH: Unexpected Re-Authentication Prompt](networking/tailscale-ssh-reauth-prompt.md)
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- [iOS Tailscale Clients Report HostName="localhost" — Breaks /etc/hosts Generators](networking/tailscale-status-json-hostname-localhost-ios.md)
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- [rsync over Tailscale: Hung in TCP Teardown After Transfer Completes](networking/rsync-tailscale-teardown-stall.md)
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- [Windows OpenSSH: WSL Default Shell Breaks Remote Commands](networking/windows-openssh-wsl-default-shell-breaks-remote-commands.md)
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- [Pi-hole AI Blocklist Blocks Claude Desktop (ERR_CONNECTION_REFUSED)](networking/pihole-blocks-claude-desktop.md)
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- [ISP SNI Filtering & Caddy](isp-sni-filtering-caddy.md)
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- [yt-dlp YouTube JS Challenge Fix](yt-dlp-fedora-js-challenge.md)
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- [wget/curl: URLs with Special Characters Fail in Bash](wget-url-special-characters.md)
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## ⚙️ Ansible & Fleet Management
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- [SSH Timeout During dnf upgrade on Fedora Hosts](ansible-ssh-timeout-dnf-upgrade.md)
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- [Vault Password File Missing](ansible-vault-password-file-missing.md)
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- [ansible.cfg Ignored on WSL2 Windows Mounts](ansible-wsl2-world-writable-mount-ignores-cfg.md)
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- [regex_search — capture-group argument doesn't work in set_fact](ansible-regex-search-set-fact-capture-group.md)
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## 📦 Docker & Systems
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- [Docker & Caddy Recovery After Reboot (Fedora + SELinux)](docker-caddy-selinux-post-reboot-recovery.md)
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- [Gitea Actions Runner: Boot Race Condition Fix](gitea-runner-boot-race-network-target.md)
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- [Systemd Session Scope Fails at Login (`session-cN.scope`)](systemd/session-scope-failure-at-login.md)
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- [MajorWiki Setup & Publishing Pipeline](majwiki-setup-and-pipeline.md)
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- [Cron Heartbeat False Alarm: /var/run Cleared by Reboot](cron-heartbeat-tmpfs-reboot-false-alarm.md)
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## 🔒 SELinux
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- [SELinux: Fixing Dovecot Mail Spool Context (/var/vmail)](selinux-dovecot-vmail-context.md)
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## 💾 Storage
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- [mdadm RAID Recovery After USB Hub Disconnect](storage/mdadm-usb-hub-disconnect-recovery.md)
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## 📝 Application Specific
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- [Obsidian Vault Recovery — Loading Cache Hang](obsidian-cache-hang-recovery.md)
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- [Gemini CLI Manual Update](gemini-cli-manual-update.md)
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## 🤖 AI / Local LLM
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- [Ollama Drops Off Tailscale When Mac Sleeps](ollama-macos-sleep-tailscale-disconnect.md)
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- [Ollama: `ollama run` with Piped Stdin Bypasses Chat Template + SYSTEM Prompt](ollama-chat-template-pipe-stdin-bypass.md)
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- [Windows OpenSSH Server (sshd) Stops After Reboot](networking/windows-sshd-stops-after-reboot.md)
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- [claude-mem Silently Fails with Claude Code 2.1+ (Empty `--setting-sources`)](claude-mem-setting-sources-empty-arg.md)
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