Daniel dcalixto

Create a Gem - Make it a CLI - Add Rspec Tests

Create a Gem - Make it a Command Line Interface - Add Rspec Tests Using Bundler & Thor

#Creating your own Gem

Run this command in your Terminal. This creates and names all the files you need for your gem. We are going to create a Lorem Ipsum Generator; you can call it whatever you want but seeing as we are creating a Lorem Ipsum generator we'll call it lorem. Read about gem naming conventions.

About the Linux Cheatsheet

maintained by Mac-arena the Bored Zo, [email protected] copyright 2003 Mac-arena the Bored Zo available from http://boredzo.fourx.org/cheatsheets/linux.txt HTML/PHP version at http://www.warpedsystems.sk.ca/ MIRRORS WELCOME! please email me if you want to mirror. some commands submitted by Steve Leopardi [email protected], frost, and rajnchaos Linux Cheatsheet IS NOT PUBLISHED BY IDG BOOKS and anyone who says it is is

Cheatsheets

NetworkOptions

@author Tim Fox

NGINX Tuning For Best Performance

For this configuration you can use web server you like, i decided, because i work mostly with it to use nginx.

Generally, properly configured nginx can handle up to 400K to 500K requests per second (clustered), most what i saw is 50K to 80K (non-clustered) requests per second and 30% CPU load, course, this was 2 x Intel Xeon with HyperThreading enabled, but it can work without problem on slower machines.

You must understand that this config is used in testing environment and not in production so you will need to find a way to implement most of those features best possible for your servers.

Stable version NGINX (deb/rpm)

	class Delivery < ActiveRecord::Base
	belongs_to :deliverable, :polymorphic => true
	belongs_to :receivable, :polymorphic => true
	has_many :delivery_impressions
	has_many :users, :through => :delivery_impressions

	belongs_to :sender, :class_name => 'User', :foreign_key => :sender_id
	end

	class DeliveryImpression < ActiveRecord::Base



	apt-get -y update
	apt-get -y install curl git-core python-software-properties

	# nginx
	add-apt-repository ppa:nginx/stable
	apt-get -y update
	apt-get -y install nginx
	service nginx start

	Introduction

	There is nothing quite like reading your (ssh) logs to instil a healthy dose of paranoia. While ssh is a powerful tool, it is a common target for "script kiddies" .

	In this tutorial I will show you several methods to help increase the security of your ssh server. My preference is to start with tools already available with a default installation and I personally tend to avoid additional services, such as denyhosts or fail2ban.

	I advise you start with proper configuration of the ssh server (sshd_config) and next take a look at ssh key authentication, TCPWrapper, and use of a firewall.

	I will cover additional services (denyhosts/fail2ban) last.

	~/Downloads$ sudo rm /etc/apt/sources.list.d/upubuntu-com-ppa-trusty*
	rm: cannot remove ‘/etc/apt/sources.list.d/upubuntu-com-ppa-trusty*’: No such file or directory
	smartron@Ubuntu1:~/Downloads$ cd /etc/apt/sources.list.d
	smartron@Ubuntu1:/etc/apt/sources.list.d$ ls -la
	-rw-r--r-- 1 root root 150 Jul 18 22:06 openshot_developers-ppa-trusty.list
	-rw-r--r-- 1 root root 150 Jul 18 22:06 openshot_developers-ppa-trusty.list.save
	smartron@Ubuntu1:/etc/apt/sources.list.d$ sudo rm openshot_developers-ppa-trusty.list
	smartron@Ubuntu1:/etc/apt/sources.list.d$ sudo rm openshot_developers-ppa-trusty.list.save
	sudo apt-get update (results look good to me - no errors)
	sudo apt-get remove gdal-bin

	How to Performance Tune Ubuntu 14.04 LTS Trusty in AWS EC2
	October 28, 2015

	This article will explain how to performance tune Ubuntu 14.04 LTS Trusty in Amazon Web Services EC2. Building a good base AWS AMI is important and if your using Ubuntu 14.04 this will hopefully be of some help.

	Step 0
	Time Matters! Make sure you have NTP installed otherwise do the following:

	sudo apt-get update

	namespace :private_pub do
	desc "Start private_pub server"
	task :start do
	run "cd #{current_path};RAILS_ENV=production bundle exec rackup private_pub.ru -s thin -E production -D -P tmp/pids/private_pub.pid"
	end

	desc "Stop private_pub server"
	task :stop do
	run "cd #{current_path};if [ -f tmp/pids/private_pub.pid ] && [ -e /proc/$(cat tmp/pids/private_pub.pid) ]; then kill -9 `cat tmp/pids/private_pub.pid`; fi"
	end