core2duoe6420

import requests
import time
from datetime import datetime, timedelta
from requests.auth import HTTPBasicAuth

last_time = datetime.min
last_message = ''

while True:
    basic = HTTPBasicAuth('admin', '${velop_password}')

reelsense

How to fix FreeBSD 11.2-RELEASE not booting because of Virtual Box driver.

I entcountered a bug with virtualbox-ose-nox11-5.2.14_1 & virtualbox-ose-kmod after upgrading to FreeBSD 11.2-RELEASE on first reboot.

The system would enter a boot loop with this crash error:

supdrvGipCreate: failed to allocate the GIP page

chrisdone

Common

export OPT=/opt
export BUILDS=/some/where/mini_linux
mkdir -p $BUILDS

Linux kernel

brendangregg

Using my perf-tools just to wrap ftrace:

# ./perf-tools/bin/kprobe 'p:tcp_v4_connect skc_dport=+2(%si):u16' 
Tracing kprobe tcp_v4_connect. Ctrl-C to end.
          telnet-9723  [001] d... 62326244.175951: tcp_v4_connect: (tcp_v4_connect+0x0/0x480) skc_dport=1600
          telnet-9725  [001] d... 62326246.502760: tcp_v4_connect: (tcp_v4_connect+0x0/0x480) skc_dport=1700
          telnet-9726  [001] d... 62326247.861937: tcp_v4_connect: (tcp_v4_connect+0x0/0x480) skc_dport=100
          telnet-9727  [001] d... 62326249.220740: tcp_v4_connect: (tcp_v4_connect+0x0/0x480) skc_dport=e803
          
Now a crappy ntohs() to process the dport string:

jayswan

# Fastly
curl -s https://api.fastly.com/public-ip-list | jq -r '.addresses | .[]'

# Google
dig @8.8.8.8 +short txt _netblocks.google.com | awk '{gsub("ip4:","");for (col=2; col<NF;++col) print $col}'

# AWS
curl -s https://ip-ranges.amazonaws.com/ip-ranges.json | \
jq --raw-output '.prefixes |  map(.ip_prefix) | .[]'

gbaman

Setting up Pi Zero OTG - The quick way (No USB keyboard, mouse, HDMI monitor needed)

More details - http://blog.gbaman.info/?p=791

For this method, alongside your Pi Zero, MicroUSB cable and MicroSD card, only an additional computer is required, which can be running Windows (with Bonjour, iTunes or Quicktime installed), Mac OS or Linux (with Avahi Daemon installed, for example Ubuntu has it built in).
1. Flash Raspbian Jessie full or Raspbian Jessie Lite onto the SD card.
2. Once Raspbian is flashed, open up the boot partition (in Windows Explorer, Finder etc) and add to the bottom of the config.txt file dtoverlay=dwc2 on a new line, then save the file.
3. If using a recent release of Jessie (Dec 2016 onwards), then create a new file simply called ssh in the SD card as well. By default SSH i

bearfrieze

Comprehensions in Python the Jedi way

by Bjørn Friese

Beautiful is better than ugly. Explicit is better than implicit.

-- The Zen of Python

I frequently deal with collections of things in the programs I write. Collections of droids, jedis, planets, lightsabers, starfighters, etc. When programming in Python, these collections of things are usually represented as lists, sets and dictionaries. Oftentimes, what I want to do with collections is to transform them in various ways. Comprehensions is a powerful syntax for doing just that. I use them extensively, and it's one of the things that keep me coming back to Python. Let me show you a few examples of the incredible usefulness of comprehensions.

tanb

TL;DR

• Create 5GB FreeBSD image.
• Install FreeBSD on xhyve.
• Mount host directory.

Requisites

• OSX
• Homebrew
• xhyve

abajwa-hw

Phoenix/Spark demo

• These demo is part of a webinar on 'HBase for Mission Critical Applications'
• The webinar recording /slides are available at http://hortonworks.com/partners/learn/#hbase2
• The Ambari service for OpenTSDB is available at https://github.com/abajwa-hw/opentsdb-service
• The full list of available workshops is available at http://hortonworks.com/partners/learn

Option 1: prebuilt VM

There is a prebuilt Centos 6.5 VM with the below components installed:

• HDP 2.3.0.0-1754
• Spark 1.3.1

lavalamp

There are three easy to make mistakes in go. I present them here in the way they are often found in the wild, not in the way that is easiest to understand.

All three of these mistakes have been made in Kubernetes code, getting past code review at least once each that I know of.

1. Loop variables are scoped outside the loop.

What do these lines do? Make predictions and then scroll down.

func print(pi *int) { fmt.Println(*pi) }