shekkbuilder / signal.c

Last active November 5, 2015 14:40 — forked from aspyct/signal.c

Unix signal handling example in C, SIGINT, SIGALRM, SIGHUP...

	/**
	* More info?
	* [email protected]
	* http://aspyct.org
	* @aspyct (twitter)
	*
	* Hope it helps :)
	*/

	#include <stdio.h>

shekkbuilder / ptr_inspect.c

Last active August 29, 2015 14:27 — forked from willb/ptr_inspect.c

This is some example code showing how to use the ptrace system call under Linux to trace the system calls of a child process.

	/*
	ptr_inspect.c

	Demonstration code; shows how to trace the system calls in a child
	process with ptrace. Only works on 64-bit x86 Linux for now, I'm
	afraid. (Even worse, it's only tested on Linux 2.6....)

	The callname() function looks clunky and machine-generated because it
	is clunky and machine-generated.

shekkbuilder / preprocessor_fun.h

Last active August 29, 2015 14:27 — forked from aras-p/preprocessor_fun.h

Things to commit just before leaving your job

	// Just before switching jobs:
	// Add one of these.
	// Preferably into the same commit where you do a large merge.
	//
	// This started as a tweet with a joke of "C++ pro-tip: #define private public",
	// and then it quickly escalated into more and more evil suggestions.
	// I've tried to capture interesting suggestions here.
	//
	// Contributors: @r2d2rigo, @joeldevahl, @msinilo, @_Humus_,
	// @YuriyODonnell, @rygorous, @cmuratori, @mike_acton, @grumpygiant,

shekkbuilder / IP-Packet-Injection.c

Last active August 29, 2015 14:27 — forked from securitytube/IP-Packet-Injection.c

IP Packet Injection. Original Source: http://code.securitytube.net/IP-Packet-Injection.c

	#include<stdio.h>
	#include<stdlib.h>
	#include<sys/socket.h>
	#include<features.h>
	#include<linux/if_packet.h>
	#include<linux/if_ether.h>
	#include<errno.h>
	#include<sys/ioctl.h>
	#include<net/if.h>
	#include<net/ethernet.h>

shekkbuilder / ARPInjector.py

Last active August 29, 2015 14:27 — forked from Ajay656-hash/ARPInjector.py

Arp injector. injects packets into network with specific source MAC and IP on specific interface

	#!/usr/bin/env python
	import socket
	import binascii
	import struct
	import pcapy
	import netifaces as ni
	import netaddr
	import random

shekkbuilder / Arpreply.py

Last active August 29, 2015 14:27 — forked from Ajay656-hash/Arpreply.py

script gives response to the arp requests messing up the network.

	#!/usr/bin/env python

	import scapy.all as sc
	import random
	import pcapy

	#list all interfaces
	devices = pcapy.findalldevs()
	print "Available devices are:"
	for d in devices :

shekkbuilder / The Technical Interview Cheat Sheet.md

Last active January 18, 2016 08:41 — forked from tsiege/The Technical Interview Cheat Sheet.md

This is my technical interview cheat sheet. Feel free to fork it or do whatever you want with it. PLEASE let me know if there are any errors or if anything crucial is missing. I will add more links soon.

Studying for a Tech Interview Sucks, so Here's a Cheat Sheet to Help

This list is meant to be a both a quick guide and reference for further research into these topics. It's basically a summary of that comp sci course you never took or forgot about, so there's no way it can cover everything in depth. It also will be available as a gist on Github for everyone to edit and add to.

Data Structure Basics

###Array ####Definition:

Stores data elements based on an sequential, most commonly 0 based, index.
Based on tuples from set theory.

shekkbuilder / learn-c-with-gdb.org

Last active August 29, 2015 14:46 — forked from cqfd/learn-c-with-gdb.org

Learning c with gdb

High-level

I want to write about why GDB is a great tool for learning C. At least part of the difficulty in learning C is that the language isn’t as interactive as using Python or Ruby.

TL;DR You can kinda use gdb as a repl for c

What’s the smallest possible program we could debug to learn about pointers?

shekkbuilder / mysql-tuning.sh

Last active September 15, 2015 00:39 — forked from willyaranda/mysql-tuning.sh

MySQL tuning

	#!/bin/sh

	# vim: ts=8
	#########################################################################
	# #
	# MySQL performance tuning primer script #
	# Writen by: Matthew Montgomery #
	# Report bugs to: https://bugs.launchpad.net/mysql-tuning-primer #
	# Inspired by: MySQLARd (http://gert.sos.be/demo/mysqlar/) #
	# Version: 1.6-r1 Released: 2011-08-06 #

shekkbuilder / log_listening_ports.sh

Last active September 17, 2015 02:33

creates simple iptables chains with logging, for all listening ports.

	#!/bin/bash
	/sbin/iptables-save > /root/iptables.rules_`date +%s`
	ssh_port=22
	remote_ip=123.123.123.123
	external_ip=123.123.123.5
	if=$(awk '$8 ~ /00000000/ {print $1}' /proc/net/route)
	local_ip=$(ifconfig $if \| grep "inet addr" \| awk -F: '{print $2}' \| awk '{print $1}')
	ipt_bin="/sbin/iptables"
	echo -n "creating iptables chains for ports: "
	ss -tln\|grep LISTEN\|awk '{print $4}'\|cut -d\: -f2\|sort\|uniq\|xargs

shekk shekkbuilder

Studying for a Tech Interview Sucks, so Here's a Cheat Sheet to Help

Data Structure Basics

High-level