scy

Opening and closing an SSH tunnel in a shell script the smart way

I recently had the following problem:

• From an unattended shell script (called by Jenkins), run a command-line tool that accesses the MySQL database on another host.
• That tool doesn't know that the database is on another host, plus the MySQL port on that host is firewalled and not accessible from other machines.

We didn't want to open the MySQL port to the network, but it's possible to SSH from the Jenkins machine to the MySQL machine. So, basically you would do something like

ssh -L 3306:localhost:3306 remotehost

dergachev

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

Mithrandir0x

// Source: https://groups.google.com/forum/#!topic/angular/hVrkvaHGOfc
// jsFiddle: http://jsfiddle.net/pkozlowski_opensource/PxdSP/14/
// author: Pawel Kozlowski

var myApp = angular.module('myApp', []);

//service style, probably the simplest one
myApp.service('helloWorldFromService', function() {
    this.sayHello = function() {
        return "Hello, World!"

bijanebrahimi

#!/bin/bash

export TARGET=amd64-marcel-freebsd9.2
export PREFIX=/usr/cross-build
export TARGET_PREFIX=$PREFIX/$TARGET
export PATH=$PATH:$PREFIX/bin

mkdir -p $TARGET_PREFIX{,/lib,/include}
mkdir build-{binutils,gmp,mpfr,mpci,gcc}

bryanbraun

Example Git Branching Diagram

You can use this diagram as a template to create your own git branching diagrams. Here's how:

1. Create a new diagram with diagrams.net (formerly draw.io)
2. Go to File > Open From > URL
3. Insert this url (it points to the xml data below): https://gist.githubusercontent.com/bryanbraun/8c93e154a93a08794291df1fcdce6918/raw/bf563eb36c3623bb9e7e1faae349c5da802f9fed/template-data.xml
4. Customize as needed for your team.

---

bmhatfield

# If you use bash, this technique isn't really zsh specific. Adapt as needed.
source ~/keychain-environment-variables.sh

# AWS configuration example, after doing:
# $  set-keychain-environment-variable AWS_ACCESS_KEY_ID
#       provide: "AKIAYOURACCESSKEY"
# $  set-keychain-environment-variable AWS_SECRET_ACCESS_KEY
#       provide: "j1/yoursupersecret/password"
export AWS_ACCESS_KEY_ID=$(keychain-environment-variable AWS_ACCESS_KEY_ID);
export AWS_SECRET_ACCESS_KEY=$(keychain-environment-variable AWS_SECRET_ACCESS_KEY);

Integralist

http://thenewstack.io/monitoring-101-collecting-right-data/

What is a metric?

Metrics capture a value pertaining to your systems at a specific point in time.

Metrics are usually collected once per second, one per minute, or at another regular interval to monitor a system over time.

For different Metric Data Types and the metric names they produce see https://docs.datadoghq.com/developers/metrics/types/?tab=histogram#metric-types

ezkl

require "faraday"
require 'typhoeus'

conn = Faraday.new(:url => 'http://httpstat.us') do |builder|
  builder.request  :url_encoded
  builder.response :logger
  builder.adapter  :typhoeus
end

conn.in_parallel do

leifg

file_to_disk = './tmp/large_disk.vdi'

Vagrant::Config.run do |config|
  config.vm.box = 'base'

  config.vm.customize ['createhd', '--filename', file_to_disk, '--size', 500 * 1024]
  config.vm.customize ['storageattach', :id, '--storagectl', 'SATA Controller', '--port', 1, '--device', 0, '--type', 'hdd', '--medium', file_to_disk]
end

danielrw7

#!/bin/sh

command="${*}"
printf "Initialized REPL for `%s`\n" "$command"
printf "%s> " "$command"
read -r input
while [ "$input" != "" ];
do
    eval "$command $input"
    printf "%s> " "$command"