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

srijanshetty

We’re now going to clean up disk space on the VM so when we package it into a new Vagrant box, it’s as clean as possible. First, remove APT cache

$ sudo apt-get clean

Then, “zero out” the drive (this is for Ubuntu):

$ sudo dd if=/dev/zero of=/EMPTY bs=1M

chaeplin

// http://www.analysir.com/blog/2014/03/19/air-conditioners-problems-recording-long-infrared-remote-control-signals-arduino/
// http://www.analysir.com/blog/wp-content/uploads/2014/03/Arduino_Record_Long_AirConditioner_Infrared_Signals_10.txt
// For LG AC

/*
Author: AnalysIR
Revision: 1.0

This code is provided to overcome an issue with Arduino IR libraries
It allows you to capture raw timings for signals longer than 255 marks & spaces.

chaeplin

// https://github.com/shirriff/Arduino-IRremote
#include <IRremote.h>

IRsend irsend;


void setup()
{
}

schtobia

#! /bin/sh
[ ! -d "$1" ] && echo "$1 is not a valid directory." && exit 1;
trap "umount \"${1}\"/tmp \"${1}\"/dev/null \"${1}\"/dev/pts \"${1}\"/dev/random \"${1}\"/dev/shm \"${1}\"/dev/urandom \"${1}\"/proc" EXIT INT TERM HUP PIPE &&
    mount --bind /tmp "${1}/tmp" && \
    mount --bind /dev/null "${1}/dev/null" && \
    mount --bind /dev/pts "${1}/dev/pts" && \
    mount --bind /dev/random "${1}/dev/random" && \
    mount --bind /dev/shm "${1}/dev/shm" && \
    mount --bind /dev/urandom "${1}/dev/urandom" && \
    mount --bind /proc "${1}/proc" && \

CMCDragonkai

Job Control in ZSH and Bash

All processes in ZSH/Bash under job control are in 3 states: foregrounded, backgrounded and suspended.

# run command in the foreground
command
# run commend in the background

mapuo

Enable KSM (Kernel Same-Page Merging) on boot in Debian

I have installed and run Netdata on my Debian based home server and I wanted to enable KSM after Netdata installer suggested it could save some RAM.

To enable the KSM on boot in Debian you I executed these steps:

1. Install ksmtuned without all the QEMU dependencies:

0x3333

#
# Authors:
#   Tercio Gaudencio Filho <[email protected]>
#
# Ex:
# USERNAME@HOSTNAME [/FULL/PATH] ✘ $                                                                   TIME

function prompt_0x3333_setup {
  setopt LOCAL_OPTIONS
  unsetopt XTRACE KSH_ARRAYS

rwb27

from __future__ import print_function

import picamera
from picamera import mmal, mmalobj, exc
from picamera.mmalobj import to_rational
import time


MMAL_PARAMETER_ANALOG_GAIN = mmal.MMAL_PARAMETER_GROUP_CAMERA + 0x59
MMAL_PARAMETER_DIGITAL_GAIN = mmal.MMAL_PARAMETER_GROUP_CAMERA + 0x5A

MawKKe

#!/usr/bin/env bash
# 
#    Author: Markus (MawKKe) [email protected]
#    Date: 2018-03-19
#
#
# What?
#
#    Linux dm-crypt + dm-integrity + dm-raid (RAID1) 
#