qistoph

# Based on gist https://gist.github.com/staaldraad/4c4c80800ce15b6bef1c1186eaa8da9f
# - added TCP states

awk 'BEGIN{states["01"]="TCP_ESTABLISHED"
states["02"]="TCP_SYN_SENT"
states["03"]="TCP_SYN_RECV"
states["04"]="TCP_FIN_WAIT1"
states["05"]="TCP_FIN_WAIT2"
states["06"]="TCP_TIME_WAIT"
states["07"]="TCP_CLOSE"

bobrik

Overly aggressive CFS

We're looking at CPU bandwidth control via CFS:

• https://www.kernel.org/doc/Documentation/scheduler/sched-bwc.txt

Reproduction program

Program does number of iterations, in each iteration we burn CPU in small chunks until we get 5ms of real time spent. On each iteration we also print how much

tyrell

Introduction

I wrote this gist to record the steps I followed to get docker running in my Raspberry Pi 3. The ARM ported debian version (Jessie) comes with an old version of docker. It is so old that the docker hub it tries to interact with doesn't work anymore :)

Hopefully this gist will help someone else to get docker running in their Raspberry Pi 3.

Installation

From original instructions at http://blog.hypriot.com/post/run-docker-rpi3-with-wifi/

restebanez

# Understanding JSON Web Tokens (JWT)

## Decoding a JWT

A JWT is formed of three parts separated by a dot: header, payload and signature. 

let's explore a real one from a curl request:

>curl -H"authorization: Bearer eyJhbGciOiJSUzI1NiIsImtpZCI6Ijc3NWMyYzkwY2JhNzQxMTg3YjhkOTdkY2NiYmIwNGU3MGNlZmVjYzQifQ.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.ivITFQ0BAmWUviY4f_MH2srMFrH1xZM6qFqcN5XZrC9WiidGhpjLMBYIBFH0eBuyRRt_U1GxR4Ko33ivF4jlqDQegcBNWQvbI5uStMk60Nu8w0_YbSr25b_7_pgt0kFrnSKEA_wTlTHhZK2oYJVbvCFAed_qETS-i74-ftXyZ3k" http://localhost:

restebanez

/* Primitive types:

 Boolean	true or false
 Number 	Any integeror floating-point numeric value
 String		A character or sequence of characters delimited by either single or double quotes
 Null		A primitive type that has only one value, null
 Undefined	A primitive type that has only one value, undefined (undefined is the value assigned to a variable that is not initialize)
 */

/* Primitive Wrapper Types

speric

Chapter 1 - Object Oriented Design

The purpose of design is to allow you to do design later, and it's primary goal is to reduce the cost of change.

SOLID Design:

• Single Responsibility Principle: a class should have only a single responsibility
• Open-Closed Principle: Software entities should be open for extension, but closed for modification (inherit instead of modifying existing classes).
• Liskov Substitution: Objects in a program should be replaceable with instances of their subtypes without altering the correctness of that program.
• Interface Segregation: Many client-specific interfaces are better than one general-purpose interface.