Yoga W. A. yogawa

Ubuntu-Server-Hardening

1. Secure Shared Memory

What is shared memory?

Shared memory is an efficient means of passing data between programs. Because two or more processes can use the same memory space, it has been discovered that, since shared memory is, by default, mounted as read/write, the /run/shm space can be easily exploited. That translates to a weakened state of security.

If you’re unaware, shared memory can be used in an attack against a running service. Because of this, you’ll want to secure that portion of system memory.

Waktu Sholat & Arah Kiblat

Informasi Waktu

https://time.sis.im/
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https://time.sis.im/?timezone=Asia/Jakarta # rekomendasi

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

	/*

	Author: Dario Longobardi
	Test ssh brute force multithreading

	*/
	#include <iostream>
	#include <unistd.h>
	#include <thread>
	#include <vector>

	<?php
	// This file walks you through the most common features of PHP's SQLite3 API.
	// The code is runnable in its entirety and results in an `analytics.sqlite` file.


	// Create a new database, if the file doesn't exist and open it for reading/writing.
	// The extension of the file is arbitrary.
	$db = new SQLite3('analytics.sqlite', SQLITE3_OPEN_CREATE \| SQLITE3_OPEN_READWRITE);

	// Errors are emitted as warnings by default, enable proper error handling.

	ssh-keygen -t rsa -b 4096 -m PEM -f jwtRS256.key
	# Don't add passphrase
	openssl rsa -in jwtRS256.key -pubout -outform PEM -out jwtRS256.key.pub
	cat jwtRS256.key
	cat jwtRS256.key.pub

	<!DOCTYPE html>
	<html>
	<head>
	<title>Hacking Javascript2img.com</title>
	<style type="text/css">
	body { font-family:Arial; }
	textarea { width:100%; height:300px; }
	button { padding:20px; width:150px; height:50px; margin-top:20px; margin-bottom:20px; }
	</style>
	</head>

	#!/bin/bash

	function log {
	echo
	echo "-- $1 --"
	}

	function run {
	echo "# $1"
	sh -c "$1"

	<?php

	// Based on <https://github.com/mecha-cms/x.minify>

	namespace x\minify\_ { // start namespace

	$n = __NAMESPACE__;

	\define($n . "\\token_boolean", '\b(?:true\|false)\b');
	\define($n . "\\token_number", '-?(?:(?:\d+)?\.)?\d+');


	---Java
	//I used this on Android
	//before you proceed, you need to ensure your private key is PKCS8 since that is what can be read natively in java.
	//If your key begins with -----BEGIN RSA PRIVATE KEY-----, the it is ssleay and you need to convert it using the openssl command below
	//openssl pkcs8 -topk8 -inform pem -in ssleay-private-key.key -outform pem -nocrypt -out pkcs8-private-key.pem

	final private static String RSA_PRIVATE_KEY =
	"-----BEGIN PRIVATE KEY-----\n" +
	"MI...\n" +