jrelo

http://brainwreckedtech.wordpress.com/2012/01/08/howto-convert-vdis-between-fixed-sized-and-dynamic-in-virtualbox/ http://www.webdesignblog.asia/software/linux-software/resize-virtualbox-disk-image-manipulate-vdi/#comment-474

While there is no way to actually switch a VDI between fixed-size and dynamic, you can clone the existing VDI into a new one with different settings with VBoxManage.

VBoxManage clonehd [old-VDI] [new-VDI] --variant Standard
VBoxManage clonehd [old-VDI] [new-VDI] --variant Fixed

If you want to expand the capacity of a VDI, you can do so with

jrelo

/**
  * Divide  : Divide the n-element array into two n/2-element
  *           sub-arrays
  * Conquer : Sort the two sub-arrays recursively using
  *           merge sort
  * Combine : Merge the two sorted subsequences to form the
  *           sorted array
  **/

#include<stdio.h>

jrelo

# Unpack
gzip -cd /boot/initramfs.example | cpio -i

# Repack
find . | cpio --dereference -o -H newc | gzip > /boot/initramfs.example

jrelo

/* --- Usage --- */
g++ server.c -o server
g++ client.c -o client
./server
./client 127.0.0.1

/* --- server.c --- */
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

jrelo

#
# NB : this is not secure
# from http://code.activestate.com/recipes/266586-simple-xor-keyword-encryption/
# added base64 encoding for simple querystring :)
#

def xor_crypt_string(data, key='awesomepassword', encode=False, decode=False):
    from itertools import izip, cycle
    import base64
    if decode:

jrelo

#
# NB : this is not secure
# from http://code.activestate.com/recipes/266586-simple-xor-keyword-encryption/
# added base64 encoding for simple querystring :)
#

def xor_crypt_string(data, key='awesomepassword', encode=False, decode=False):
    from itertools import izip, cycle
    import base64
    if decode:

jrelo

The fastest remote directory rsync over ssh archival I can muster (40MB/s over 1gb NICs)

This creates an archive that does the following:

rsync (Everyone seems to like -z, but it is much slower for me)

• a: archive mode - rescursive, preserves owner, preserves permissions, preserves modification times, preserves group, copies symlinks as symlinks, preserves device files.
• H: preserves hard-links
• A: preserves ACLs

jrelo

#!/usr/bin/env python
from __future__ import print_function
import sys
import os
import re
import ctypes
import argparse

ulseek = ctypes.cdll['libc.so.6'].lseek
ulseek.restype = ctypes.c_uint64

jrelo

#!/usr/env python

###############################################################################################################
## [Title]: linuxprivchecker.py -- a Linux Privilege Escalation Check Script
## [Author]: Mike Czumak (T_v3rn1x) -- @SecuritySift
##-------------------------------------------------------------------------------------------------------------
## [Details]: 
## This script is intended to be executed locally on a Linux box to enumerate basic system info and 
## search for common privilege escalation vectors such as world writable files, misconfigurations, clear-text
## passwords and applicable exploits. 

jrelo

/* Doubly Linked List implementation */
#include<stdio.h>
#include<stdlib.h>

struct Node  {
	int data;
	struct Node* next;
	struct Node* prev;
};