Marcus Summers
181c04bed8
Documents the cosmetic but persistent warning during dnf upgrades: "/usr/sbin cannot be merged yet, /usr/sbin/ebtables points to /etc/alternatives/ebtables" Stale update-alternatives symlinks (not rpm-owned) block Fedora's /usr/sbin -> /usr/bin consolidation. Article covers root cause, investigation steps, and the fix (tear down + re-register with /usr/bin paths only). References the Ansible playbook fix_ebtables_usrmerge.yml that implements this fleet-wide. Applied 2026-04-19 across majorlab, majorhome, majormail, majordiscord.
2.6 KiB
2.6 KiB
| created | updated |
|---|---|
| 2026-03-15T06:37 | 2026-04-19 |
🔧 General Troubleshooting
Practical fixes for common Linux, networking, and application problems.
🖥️ GPU & AI
🌐 Networking & Web
- Apache Outage: Fail2ban Self-Ban + Missing iptables Rules
- Mail Client Stops Receiving: Fail2ban IMAP Self-Ban
- firewalld: Mail Ports Wiped After Reload
- Tailscale SSH: Unexpected Re-Authentication Prompt
- Windows OpenSSH: WSL Default Shell Breaks Remote Commands
- ISP SNI Filtering & Caddy
- yt-dlp YouTube JS Challenge Fix
- wget/curl: URLs with Special Characters Fail in Bash
⚙️ Ansible & Fleet Management
- SSH Timeout During dnf upgrade on Fedora Hosts
- Vault Password File Missing
- ansible.cfg Ignored on WSL2 Windows Mounts
- Fedora usrmerge: ebtables Symlink Blocks Directory Consolidation
📦 Docker & Systems
- Docker & Caddy Recovery After Reboot (Fedora + SELinux)
- Gitea Actions Runner: Boot Race Condition Fix
- Systemd Session Scope Fails at Login (
session-cN.scope) - MajorWiki Setup & Publishing Pipeline
- Cron Heartbeat False Alarm: /var/run Cleared by Reboot