#!/bin/bash
this_file="$(realpath -s $0)"

# Ensure running as sudo
id
if [ `id -u` -ne 0 ]; then
	echo Need sudo
	exit 1
fi

# Set time zone
timedatectl set-timezone Asia/Singapore

# Update packages
apt update
apt -y full-upgrade

# Regenerate SSH host keys
test -f /etc/ssh/ssh_host_rsa_key || dpkg-reconfigure openssh-server

# Clear file, and replace rc.local <- rc.local.bak
if [ "$this_file" -ef /etc/rc.local ]; then
        rm -f /etc/rc.local;
        test -f /etc/rc.local.bak && mv /etc/rc.local.bak /etc/rc.local;
else
        rm -f "$this_file"
fi

# Reboot
shutdown -r now