lxd-claude-setup

LXD Claude Code Setup

Runbook for provisioning Claude Code on a headless Proxmox LXD container — including all known failure modes encountered in production.

Trigger

Use this skill when:

• Setting up Claude Code on a new LXD / headless Linux host
• Claude Code TUI loops on login selection screen
• OAuth fails with Unknown scope: org:create_api
• SSH fingerprint mismatch on reprovisioned host
• Need to auth with org Max subscription on a server

---

Step 1 — SSH Access

Clear old fingerprint (reprovisioned host):

ssh-keygen -R <HOST_IP>

If password auth is disabled (Permission denied (publickey) with -v): On the server console, edit /etc/ssh/sshd_config:

PasswordAuthentication yes

sudo systemctl restart sshd

Copy SSH key for passwordless access:

sshpass -p 'PASSWORD' ssh-copy-id -o StrictHostKeyChecking=no USER@HOST

Install sshpass if needed: brew install sshpass

---

Step 2 — Install Node.js + Claude Code

# Node.js 22
curl -fsSL https://deb.nodesource.com/setup_22.x | sudo bash -
sudo apt-get install -y nodejs

# Claude Code (requires sudo for global npm)
sudo npm install -g @anthropic-ai/[email protected]

Pin to 2.1.128. Versions >= 2.1.129 request org:create_api OAuth scope which fails on Max subscriptions.

Alternatively via official script (then downgrade if needed):

curl -fsSL https://claude.ai/install.sh | bash
sudo npm install -g @anthropic-ai/[email protected]

---

Step 3 — Authenticate (Headless OAuth via Port Forward)

The server has no browser. Forward the OAuth callback port through SSH:

ssh -L 54545:localhost:54545 USER@HOST

Inside that session:

claude auth login --claudeai

A URL will appear — open it in your local Mac browser. Complete login. Token saved to ~/.claude/.credentials.json on the server.

Verify:

claude auth status        # should show loggedIn: true, subscriptionType: max
claude -p "say hi"        # should respond

---

Step 4 — Fix TUI Onboarding Loop

Symptom: claude TUI always shows login method selection on every launch, even though claude auth status and claude -p work fine.

Root cause: ~/.claude.json is missing hasCompletedOnboarding: true. The TUI checks this flag before skipping the onboarding flow.

Fix:

python3 -c "
import json
with open('/home/USER/.claude.json', 'r') as f:
    d = json.load(f)
d['hasCompletedOnboarding'] = True
d['lastOnboardingVersion'] = '2.1.128'
with open('/home/USER/.claude.json', 'w') as f:
    json.dump(d, f)
print('Fixed.')
"

After this, claude launches straight into the TUI. No re-auth needed.

---

Key Files on the Remote Host

File	Purpose
~/.claude.json	TUI state — onboarding flags, account cache, feature flags
~/.claude/.credentials.json	OAuth tokens (access + refresh)
~/.claude/settings.json	UI settings (theme, etc.)

---

Troubleshooting Reference

Error	Cause	Fix
Permission denied (publickey)	PasswordAuthentication no in sshd	Enable it, restart sshd
Unknown scope: org:create_api	Claude Code >= 2.1.129	Downgrade to 2.1.128
TUI loops on login screen	Missing hasCompletedOnboarding in ~/.claude.json	Add flag via python3 snippet above
claude -p works but TUI doesn't	Credentials saved but onboarding not marked complete	Same fix as above
OAuth callback fails on headless	No browser on server	Use ssh -L 54545:localhost:54545 tunnel