malefs

# iptables basic rules to use (in order)

# set default policy to drop
iptables -P INPUT DROP
iptables -P OUTPUT ACCEPT
iptables -P FORWARD ACCEPT

# enable ssh on port 22
iptables -A INPUT -p tcp -m tcp --dport 22 -j ACCEPT

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# Generated by iptables-save v1.4.14 on Wed May 14 23:43:26 2014
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]

# accept all loop traffic, discard all malicious localloop traffic
-A INPUT -i lo -j ACCEPT
-A INPUT -d 127.0.0.0/8 ! -i lo -j REJECT --reject-with icmp-port-unreachable

malefs

Avoid ssh lost connection due to innactivity

On the server, edit the file /etc/ssh/sshd_config:

ClientAliveInterval 30
ClientAliveCountMax 10

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#!/bin/bash

# Secure OpenVPN server installer for Debian, Ubuntu, CentOS and Arch Linux
# https://github.com/Angristan/OpenVPN-install


if [[ "$EUID" -ne 0 ]]; then
	echo "Sorry, you need to run this as root"
	exit 1
fi

malefs

Python environment cheatsheet

virtualenv

Tool for creating isolated Python environments

The common use-cases:

• Handling different versions of same libraries per each service
• Same plus no access to site-packages

malefs

//
//  "Pacifica"
//  Gentle, blue-green ocean waves.
//  December 2019, Mark Kriegsman and Mary Corey March.
//  For Dan.
//

#define FASTLED_ALLOW_INTERRUPTS 0
#include <FastLED.h>
FASTLED_USING_NAMESPACE

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# --------- SCRIPT BEGIN ----------
# By Bret Stateham
# This script assumes
# - You are running on a linux machine
# - You have the can-utils installed and working.  See:
#   - https://github.com/linux-can/can-utils
#   - https://www.kernel.org/doc/Documentation/networking/can.txt
# - You have a can device attached and configured as can0 (you can change the targetbus variable to match if otherwise)
# - The can device is attached to your running target vehicle

malefs

MySQL

Getting started

• http://www.sqlteaching.com/
• https://www.codecademy.com/learn/learn-sql

Related tutorials

• MySQL-CLI
• Analyzing Business Metrics
• SQL joins infografic

malefs

#include <string>
#include <ctime>
#include <msgpack.hpp>

struct message
{
  std::string tag;
  std::time_t time;
  std::string text;
  MSGPACK_DEFINE(tag, time, text);

malefs

# capture mjpegstream -r Framerate 
ffmpeg -f mjpeg -r 2 -i "http://127.0.0.1/rpicam/cam_pic_new.php?" -r 2 ./video.avi