komuw

#first seen here: http://www.snip2code.com/Snippet/63701/Ansible-task-to-install-nvm-and-node
# Here is how to install nvm and node in an Ansible task.
# I tried a bunch of different things, and as usual it's simple, but you have to get it right.
# The important part is that you have to shell with /bin/bash -c and source nvm.sh
---
- name: Install nvm
  shell: >
    curl https://raw.githubusercontent.com/creationix/nvm/v0.7.0/install.sh | sh
    creates=/home/{{ ansible_user_id }}/.nvm/nvm.sh

komuw

1. Safe Operations For High Volume PostgreSQL: https://www.braintreepayments.com/blog/safe-operations-for-high-volume-postgresql

2. • https://medium.com/paypal-tech/postgresql-at-scale-database-schema-changes-without-downtime-20d3749ed680
   • https://gist.github.com/jcoleman/1e6ad1bf8de454c166da94b67537758b

3. Zero downtime database migrations: https://www.rainforestqa.com/blog/2014-06-27-zero-downtime-database-migrations

4. Online migrations at scale: https://stripe.com/blog/online-migrations

5. Rails migrations, zero downtime: https://blog.codeship.com/rails-migrations-zero-downtime

komuw

package main

import (
	"fmt"
	"os"

	"github.com/klauspost/reedsolomon"
)

// You can use erasure encoding to;

komuw

`pip install pycrypto`

from Crypto.Cipher import DES3
from Crypto import Random
key = 'Sixteen byte key'
iv = Random.new().read(DES3.block_size) #DES3.block_size==8
cipher_encrypt = DES3.new(key, DES3.MODE_OFB, iv)
plaintext = 'sona si latine loqueri  ' #padded with spaces so than len(plaintext) is multiple of 8
encrypted_text = cipher_encrypt.encrypt(plaintext)

komuw

import os
import errno
import time


"""
The linux pipe buffers are implemnted as circular buffers[1].
A consequence of the circular buffer is that when it is full and a subsequent write is performed:
  (a) then it starts overwriting the oldest data[2].
  (b) Alternatively, the routines that manage the buffer could prevent overwriting the data and return an error or raise an exception.

komuw

If for any reason you don't have a GUI VPN client(you like running headless ubuntu 
or have ubuntu installed on a chromebook). You can use vpnc as a command line VPN client 
#this is a comment

#install vpnc
$ sudo apt-get install network-manager-vpnc
#look to see if you have vpnc installed
$ sudo vpnc --help #use sudo to run vpnc command
#if not installed, install it:
$ sudo apt-get install vpnc

komuw

apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
  # name must match the spec fields below, and be in the form: <plural>.<group>
  name: komucrontabs.stable.example.com
spec:
  # group name to use for REST API: /apis/<group>/<version>
  group: stable.example.com
  # list of versions supported by this CustomResourceDefinition
  versions:

komuw

1. intro, download, install & setup
2. basics, syntax
3. control flow
4. more types, data structures
5. methods & interfaces
6. concurrency
7. nice to know stuff
8. golang gotchas <-- especially if you are coming from python, ruby etc
9. workspace

komuw

package main

import (
	"crypto/aes"
	"crypto/cipher"
	"crypto/rand"
	"crypto/sha256"
	"encoding/base64"
	"errors"
	"fmt"

komuw

# rabbitMQ password hashing algo as laid out in: http://lists.rabbitmq.com/pipermail/rabbitmq-discuss/2011-May/012765.html

from __future__ import print_function
import base64
import os
import hashlib
import struct

# This is the password we wish to encode
password = 'simon'