ageis

security and hardening options for systemd service units

A common and reliable pattern in service unit files is thus:

NoNewPrivileges=yes
PrivateTmp=yes
PrivateDevices=yes
DevicePolicy=closed
ProtectSystem=strict

cabal95

#!/bin/bash
#

BACKUPDEST="$1"
DOMAIN="$2"
MAXBACKUPS="$3"

if [ -z "$BACKUPDEST" -o -z "$DOMAIN" ]; then
    echo "Usage: ./vm-backup <backup-folder> <domain> [max-backups]"
    exit 1

shamil

How to mount a qcow2 disk image

This is a quick guide to mounting a qcow2 disk images on your host server. This is useful to reset passwords, edit files, or recover something without the virtual machine running.

Step 1 - Enable NBD on the Host

modprobe nbd max_part=8

luzfcb

# coding: utf-8
# by Joao Bueno
from random import randrange, choice
import pygame
 
FR = 30
SIZE = 640, 480
BGCOLOR = (255,255,255)
NODECOLOR = (255,0,0)
NODESIZE = 10,10

andreasf

#!/usr/bin/env python
# -*- coding=utf8 -*-
"""
nginx-ldapauthd
===============

A backend for the nginx auth_request module.

* Listens on unix socket (SOCK_NAME) and authenticates users against LDAP
* Two modes:

egonelbre

package astar

import "container/heap"

type NodeQueue []Node

func NewNodeQueue() NodeQueue {
	return make(NodeQueue, 0, 1000)
}

pascalpoitras

Mouse

---

enable

---

johntyree

#!/usr/bin/env sh

# Download lists, unpack and filter, write to stdout
curl -s https://www.iblocklist.com/lists.php \
  | sed -n "s/.*value='\(http:.*=bt_.*\)'.*/\1/p" \
  | xargs wget -O - \
  | gunzip \
  | egrep -v '^#'

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD