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#!/bin/bash
# call this script with an email address (valid or not).
# like:
# ./makecert.sh [email protected]
mkdir certs
rm certs/*
echo "make server cert"
openssl req -new -nodes -x509 -out certs/server.pem -keyout certs/server.key -days 3650 -subj "/C=DE/ST=NRW/L=Earth/O=Random Company/OU=IT/CN=www.random.com/emailAddress=$1"
echo "make client cert"
openssl req -new -nodes -x509 -out certs/client.pem -keyout certs/client.key -days 3650 -subj "/C=DE/ST=NRW/L=Earth/O=Random Company/OU=IT/CN=www.random.com/emailAddress=$1"

grisu48

OSC Cheat sheet

This small cheat sheet has been created by me after duing the OBS training with mpluskal. Hope it is of help to anybody that is starting with obs :-)

Configure OBS

First, let's set some aliases for the shell

$ vim ~/.bashrc

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# WTFPL, phoenix - http://www.wtfpl.net/
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
#

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#!/bin/bash
## 2019, phoenix
## Start Raspberry Pi in QEMU instance
##
# 
# 1. Get the Raspian image: https://www.raspberrypi.org/downloads/raspbian/
# 2. Get Raspberry Kernel and dtb: https://github.com/dhruvvyas90/qemu-rpi-kernel
# 3. Extract Raspbian and put the Kernel and the dtb into a directory
# 4. Convert the IMG to a QCOW2: qemu-img convert -f raw -O qcow22019-09-26-raspbian-buster-lite.img 2019-09-26-raspbian-buster-lite.qcow
# 5. Make some more space: qemu-img resize 2019-09-26-raspbian-buster-lite.qcow2 +5G

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// Convert a struct sockaddr address to a string, IPv4 and IPv6:

char *get_ip_str(const struct sockaddr *sa, char *s, size_t maxlen)
{
    switch(sa->sa_family) {
        case AF_INET:
            inet_ntop(AF_INET, &(((struct sockaddr_in *)sa)->sin_addr),
                    s, maxlen);
            break;

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#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import random
import numpy as np
from math import *
import time
import sys

class Gauss2d :

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---
- hosts: ap-nodes
  gather_facts: no
  tasks:
    - name: shutdown
      command: /sbin/shutdown -h now
      sudo: yes

    - name: wait go down
      local_action: wait_for host={{ ansible_ssh_host }} port=22 state=stopped

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#!/bin/bash
# Shell script to stop all KVM instances, create a BTRFS snapshot (read-only) and restart the stopped KVM instances
# https://gist.github.com/grisu48/535c27cd25c096248ce234ad81abf1b9

## Configuration ##############################################################

IMGDIR="/mnt/RAID/libvirt/images"
SNAPDIR="/mnt/RAID/libvirt/snapshots"
# timeout in seconds
TIMEOUT=300

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#!/bin/bash

alias killall="killall -u `whoami` -i"
alias weather="curl 'http://wttr.in/'"

ctrim() {
	if [ $# -lt 1 ]; then
		echo "ctrim - trim the given pictures (using convert --trim)"
	else
		for i in $@; do

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#!/bin/bash
# Bash function to trim pictures using imagemagick
# This snippet is meant to be inserted as function in ~/.bashrc

ctrim() {
        if [ $# -lt 1 ]; then
                echo "ctrim - trim the given pictures (using convert --trim)"
        else
                # TODO: Parallel runs
                for i in $@; do