darcyclark

# put this in /lib/resque.rb

require 'mail'

module Emailer

  class Send
    @queue = :issue_mailer

    def self.perform(addressee, subject, body)

inertialbit

---
- name: install rb-installer
  action: shell curl https://raw.github.com/fesplugas/rbenv-installer/master/bin/rbenv-installer | bash
 
- name: update PATH in ~/.bash_profile for rb-env
  action: lineinfile dest=/home/$user/.bash_profile line=export\ PATH="$HOME/.rbenv/bin:$PATH" regexp=PATH.*rbenv
 
- name: add rb-env init to ~/.bash_profile
  action: lineinfile dest=/home/$user/.bash_profile line='eval "$(rbenv init -)"' regexp=eval.*rbenv
 

alainravet

# response to http://jumpstartlab.com/news/archives/2013/04/23/the-death-of-ifs

#-----------------
# Commands :
#-----------------

class Command
  class Quit       ; def execute ; exit                   end end
  class Invalid    ; def execute ; puts 'invalid command' end end
  class Tweeting   ; def execute ; puts "tweeting"        end end

jlecour

# encoding: UTF-8

require 'optparse'
require 'net/http'
require 'json'

def parse_options(argv)
  opts = {}

  @parser = OptionParser.new do |o|

gstark

Use tcpdump to monitor mysql

  # Capture the packets
  sudo tcpdump -i eth0 port 3306 -s 65535 -x -n -q -tttt > tcpdump.out

  # analyze all the requests from a given host
  pt-query-digest --type=tcpdump --filter '($event->{host} || $event->{ip} || "") =~ m/192.168.248.64/' tcpdump.out

outro56

progrium/bashstyle

Bash is the JavaScript of systems programming. Although in some cases it's better to use a systems language like C or Go, Bash is an ideal systems language for smaller POSIX-oriented or command line tasks. Here's three quick reasons why:

• It's everywhere. Like JavaScript for the web, Bash is already there ready for systems programming.
• It's neutral. Unlike Ruby, Python, JavaScript, or PHP, Bash offends equally across all communities. ;)
• It's made to be glue. Write complex parts in C or Go (or whatever!), and glue them together with Bash.

This document is how I write Bash and how I'd like collaborators to write Bash with me in my open source projects. It's based on a lot of experience and time collecting best practices. Most of them come from these two articles, but here integrated, slightly modified, and focusing on the most bang for buck items. Plus some ne

piotr1212

cat /usr/share/grafana/grafana-backup.sh
#!/bin/bash

DB="/var/lib/grafana/grafana.db"
BACKUP="/data/backup/grafana/grafana.db-$(date +%Y%m%d).bck"
SQLITE=/usr/bin/sqlite3
ZIP=/bin/gzip

${SQLITE} ${DB} ".backup ${BACKUP}"
${ZIP} ${BACKUP}

vasanthk

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

tsavola

package main

import (
	"context"
	"crypto/tls"
	"net"
	"time"
)

func dialContextWithDialer(ctx context.Context, dialer *net.Dialer, network, addr string, config *tls.Config) (*tls.Conn, error) {

peterhellberg

package main

import (
	"context"
	"log"
	"net/http"
	"os"
	"os/signal"
	"time"
)