Ubuntu CT auto login

autologin.sh

# Yes the script is mostly made using AI

#!/bin/bash
# ==============================================================================
# Script Name: proxmox-lxc-autologin.sh
# Description: Enables automatic root login on Proxmox Ubuntu LXC text consoles.
# Target OS:   Ubuntu 24.04 / 25.04 (LXC Container)
# ==============================================================================

# Ensure the script is run as root
if [ "$EUID" -ne 0 ]; then
  echo "Error: Please run this script as root or with sudo."
  exit 1
fi

echo "=== Starting Proxmox LXC Autologin Setup ==="

# 1. Reset and wipe out any previous failed configuration attempts
echo "[1/4] Cleaning up old configuration files..."
rm -rf /etc/systemd/system/container-getty@*
rm -rf /etc/systemd/system/getty@*

# 2. Create the systemd drop-in directory for container-getty@1
echo "[2/4] Creating systemd service directory..."
TARGET_DIR="/etc/systemd/system/container-getty@1.service.d"
mkdir -p "$TARGET_DIR"

# 3. Inject the clean override configuration
echo "[3/4] Writing new override configuration file..."
cat << 'EOF' > "$TARGET_DIR/override.conf"
[Service]
ExecStart=
ExecStart=-/sbin/agetty --autologin root --noclear --keep-baud tty%I 115200,38400,9600 $TERM
EOF

# 4. Reload the systemd daemon to pick up the changes
echo "[4/4] Reloading systemd configurations..."
systemctl daemon-reload

echo "=== Setup Complete! ==="
echo "The container will now reboot to apply the automatic root login..."
sleep 2

# Reboot the container
reboot