MC42

Let's Encrypt certbot ACME client manual DNS challenge

certbot certonly [--dry-run] --manual --preferred-challenges dns-01 \
--domain example.com --domain www.example.com [...]

For each host passed via --domain, Let's Encrypt will prompt the user to create an _acme-challenge TXT record (_acme-challenge.example.com, _acme-challenge.www.example.com, etc.) with a specific value.

MC42

#!/bin/bash

curl -s https://api.github.com/repos/opencv/opencv/releases/latest \
| grep "browser_download_url.*zip" \
| cut -d : -f 2,3 \
| tr -d \" \
| wget -qi -

MC42

import cv2
import sys


class Camera(object):

    def __init__(self, index=0):
        self.cap = cv2.VideoCapture(index)
        self.openni = index in (cv2.CAP_OPENNI, cv2.CAP_OPENNI2)
        self.fps = 0