Proxmox LXC Configuration for Claude Code or LLM troubleshooting

README.md

SSH

Create a user

adduser claude

then follow the prompts

Configure Public Key SSH access

mkdir /home/claude/.ssh
touch /home/claude/.ssh/authorized_keys
chown claude:claude -R /home/claude/.ssh
chmod 700 /home/claude/.ssh
chmod 600 /home/claude/.ssh/authorized_keys
cat claude_ed25519.pub >> /home/claude/.ssh/authorized_keys

Or user nano and copy the contents of the pub file to authorized_keys.

Edit SSH config - add or change the following lines:

nano /etc/ssh/sshd_config

PubkeyAuthentication yes
# Expect .ssh/authorized_keys2 to be disregarded by default in future. 
AuthorizedKeysFile .ssh/authorized_keys .ssh/authorized_keys2
AllowUsers claude

Restart SSH service

systemctl daemon-reload
systemctl restart ssh

Configure SUDO

visudo

Add the following line

claude ALL=(root) NOPASSWD: /usr/bin/journalctl, /bin/systemctl status myapp