SVilgelm

def get_key_from_dict_by_value(dictionary, value):
    for k in dictionary:
        if dictionary[k] == value:
            return k

SVilgelm

#!/usr/bin/env python3
import asyncio
from aiohttp import web

import argparse
import logging
from urllib import parse

logging.basicConfig(level=logging.DEBUG)
logger = logging.getLogger()

SVilgelm

import functools


def dec(func=None):
    if func is None:
        return lambda f: dec(f)
    @functools.wraps(func)
    def wrapper(*args, **kwargs):
        print('wrapper')
        return func(*args, **kwargs)

SVilgelm

Here is a quick tutorial to set up a basic PPTP VPN server on Ubuntu 12.04.

Install Necessary Packages
  $ aptitude install ppp pptpd
  
Configure DNS Servers to Use When Clients Connect to this PPTP Server
  $ nano /etc/ppp/pptpd-options

Modify OR Add the following lines in end
  ms-dns 8.8.8.8

SVilgelm

#!/usr/bin/env python2

from email import header
from email.mime import audio
from email.mime import application
from email.mime import image
from email.mime import multipart
from email.mime import text
import logging
import mimetypes

SVilgelm

#/etc/rc.local
 
ipset create black_ips hash:ip
iptables -A INPUT -m set --match-set black_ips src -j DROP
grep "Failed password for" /var/log/auth.log | grep -o -E '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | sort | uniq -c | awk '$1 > 5 { print $2}' | xargs -I{} ipset add black_ips {}

SVilgelm

# to generate your dhparam.pem file, run in the terminal
openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048

SVilgelm

#!/bin/bash

function get_ids {
    echo `$@ --fields=id | tail -n+4 | head -n-1 | awk '{ print $2 }'`
}

function get_body {
    echo `$@ | tail -n+4 | head -n-1`
}

SVilgelm

• Old code

  exec_cmd('ping {ip}'.format(ip=ip))

  Rewritten code

  exec_cmd(format_cmd('ping {ip}', ip=ip))

  Examples

  format_cmd('ping {ip}', ip="$(rm -rf /)")
  $ ping '$(rm -rf /)'
  ping: cannot resolve $(rm -rf /): Unknown host 

SVilgelm

// https://www.joeshaw.org/dont-defer-close-on-writable-files/
func helloNotes() error {
	f, err := os.Create("/home/joeshaw/notes.txt")
	if err != nil {
		return err
	}
	defer f.Close()

	if err = io.WriteString(f, "hello world"); err != nil {
		return err