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Hyper‑V VM Auto‑Control Script

Overview

This PowerShell script automatically manages the running state of specific Hyper‑V virtual machines based on a defined work schedule.
It ensures that the listed VMs are running during business hours (Monday–Friday, 08:00–17:00) and stopped outside of those hours — with one important exception:

If a VM is manually started outside the scheduled period (e.g., via Hyper‑V Manager or another PowerShell session), the script will detect this and keep it running until the next scheduled start period. This prevents unwanted shutdowns of manually started VMs.

The script also:

• Logs all actions to the Windows Event Log (Application log, source: HyperV-AutoControl).

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Fiber Optics Cabling Cheat Sheet

Multimode vs. Singlemode Fiber

Property	Multimode (OM1, OM2, OM3, OM4, OM5)	Singlemode (OS1, OS2)
Core Diameter	50 µm (OM3/OM4/OM5), 62.5 µm (OM1)	8-9 µm
Wavelength	850 nm (VCSEL) / 1300 nm (older LEDs)	1310 nm, 1550 nm, 1625 nm
Light Source	LED (OM1/OM2), VCSEL (OM3/OM4/OM5)	DFB Laser, EML Laser
Distance (Range)	OM1: 300 m @ 850 nm, OM2: 550 m @ 850 nm, OM3: 300 m @ 10G, OM4: 400 m @ 10G, OM5: Optimized for SWDM	OS1: Up to 10 km (Indoor), OS2: Up to 200 km (with amplification)

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apiVersion: apps/v1
kind: Deployment
metadata:
  name: wordpress
spec:
  replicas: 1
  selector:
    matchLabels:
      app: wordpress
  template:

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version: '3.1'

services:

  wordpress:
    image: wordpress
    container_name: wordpress
    restart: always
    labels:
      - "traefik.enable=true"

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<?php
exec('/bin/hostname');
?>

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Create Deployment from running Docker container

docker run -d --restart=always --name juice-shop -p 80:3000 bkimminich/juice-shop

kubectl get deploy juice-shop -o yaml \ 
  | yq eval 'del(.metadata.resourceVersion, .metadata.uid, .metadata.annotations, .metadata.creationTimestamp, .metadata.selfLink, .metadata.managedFields, .status)' - > juice-shop.yaml

Also look here:

https://kubernetes.io/de/docs/reference/kubectl/cheatsheet/

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#!/bin/bash

case $(awk -F= '/^ID/{print $2}' /etc/os-release) in
  debian|ubuntu)
    sudo apt-get -y install python3-venv
  ;;

  rhel|centos)
    sudo yum -y install python3-venv
  ;;

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#!/bin/bash

apt-get -y remove docker docker-engine docker.io containerd runc
apt-get -y update
apt-get -y install apt-transport-https ca-certificates curl gnupg lsb-release
curl -fsSL https://download.docker.com/linux/debian/gpg | gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
echo "deb [arch=amd64 signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/debian $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
apt-get -y update
apt-get -y install docker-ce docker-ce-cli containerd.io

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#!/bin/bash

access_token=$1

# identify distro and install docker
#
if [[ $(cat /etc/os-release) == *"openSUSE"* ]]; then
  # openSUSE
  sudo zypper install -y docker
elif [[ $(lsb_release -a) == *"Ubuntu"* || $(lsb_release -a) == *"Debian"* ]]; then

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# bash prompt 
export PS1="\u@\h:\w\e[0;32m>\e[m "

# create a 24 character alphanumeric pre-shared-key based on random data
# tested on macOS & OpenSUSE Linux
alias psk='cat /dev/urandom | env LC_CTYPE=C tr -dc a-zA-Z0-9 | head -c 24; echo'