Ubuntu Clone Hostname Reset

#!/bin/bash

# Exit on error
set -e

# Check if script is run as root
if [ "$EUID" -ne 0 ]; then
  echo "Please run as root"
  exit 1
fi

# Generate new hostname
NEW_HOSTNAME="vm-$(cat /dev/urandom | tr -dc 'a-z0-9' | head -c 8)"

# Set new hostname
hostnamectl set-hostname "$NEW_HOSTNAME"
echo "$NEW_HOSTNAME" > /etc/hostname

# Clear domain name
sed -i '/^127.0.1.1/d' /etc/hosts
echo "127.0.1.1 $NEW_HOSTNAME" >> /etc/hosts

# Reset machine-id
truncate -s 0 /etc/machine-id
rm -f /var/lib/dbus/machine-id
systemd-machine-id-setup

# Clear SSH keys
rm -f /etc/ssh/ssh_host_*
dpkg-reconfigure openssh-server

# Reset network configuration
nmcli con delete "$(nmcli -t -f UUID con show)"
nmcli con add type ethernet ifname eth0 con-name "eth0" autoconnect yes

# Clear logs
truncate -s 0 /var/log/*.log
truncate -s 0 /var/log/**/*.log

# Remove temporary files
rm -rf /tmp/*
rm -rf /var/tmp/*

echo "VM template reset complete. New hostname: $NEW_HOSTNAME"