neilzheng

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

#First released as C++ program by Hiroyuki Tsutsumi as part of the free software suite “Beer”
#I thought porting it to Python could be both a challenge and useful

from sys import argv, exit, getsizeof
from struct import pack_into, unpack_from

def ceil4(n):

neilzheng

#!/usr/bin/env python3.5
import socket
import asyncio
from struct import pack, unpack


class Client(asyncio.Protocol):
    def connection_made(self, transport):
        self.transport = transport
        self.server_transport = None

neilzheng

- install the two shellscripts into the appropriate places under /etc/initramfs-tools
- run update-initramfs
- put "overlay=yes" on the kernel command line
- reboot

With the overlay in place, the real root is mounted readonly on /ro.
Only the root fs is changed, other filesystems are mounted normally.

Remove "overlay=yes" (or change it to something other than yes) and reboot to go back to readwrite.
(This probably means that you want the commandline config to live somewhere other than on the root fs, e.g. under /boot)