exAspArk

Each of these commands will run an ad hoc http static server in your current (or specified) directory, available at http://localhost:8000. Use this power wisely.

Discussion on reddit.

Python 2.x

$ python -m SimpleHTTPServer 8000

Every so often I have to restore my gpg keys and I'm never sure how best to do it. So, I've spent some time playing around with the various ways to export/import (backup/restore) keys.

Method 1

Backup the public and secret keyrings and trust database

cp ~/.gnupg/pubring.gpg /path/to/backups/
cp ~/.gnupg/secring.gpg /path/to/backups/
cp ~/.gnupg/trustdb.gpg /path/to/backups/

or, instead of backing up trustdb...

Studying for a Tech Interview Sucks, so Here's a Cheat Sheet to Help

This list is meant to be a both a quick guide and reference for further research into these topics. It's basically a summary of that comp sci course you never took or forgot about, so there's no way it can cover everything in depth. It also will be available as a gist on Github for everyone to edit and add to.

Data Structure Basics

###Array ####Definition:

Stores data elements based on an sequential, most commonly 0 based, index.
Based on tuples from set theory.

Commands examples

If the namespace is not used then the commands will perform on top of the default database.

  bundle exec rake db:create
  bundle exec rake db:migrate

By using the namespace we are going to use all the configuration for our alternate DB.

Backend Architectures

Twitter

ror, scala, jetty, erlang, thrift, mongrel, comet server, my-sql, memchached, varnish, kestrel(mq), starling, gizzard, cassandra, hadoop, vertica, munin, nagios, awstats

Introduce Gizzard of Twitter - 트위터의 새로운 분산 관리 라이브러리 Gizzard를 소개합니다.
The Architecture Twitter Uses to Deal with 150M Active Users, 300K QPS, a 22 MB/S Firehose, and Send Tweets in Under 5 Seconds
Scaling Twitter: Making Twitter 10000 Percent Faster

	mkdir ~/vim
	cd ~/vim

	# Staically linked vim version compiled from https://github.com/ericpruitt/static-vim
	# Compiled on Jul 20 2017
	curl 'https://s3.amazonaws.com/bengoa/vim-static.tar.gz' \| tar -xz

	export VIMRUNTIME="$HOME/vim/runtime"
	export PATH="$HOME/vim:$PATH"
	cd -

	#!/bin/sh

	###############################################################################

	# USAGE:
	# > ansible_vault_merge.sh [-p PASSWORD_FILE VAULT_YAML_FILE

	# This shell script handles conflicts generated by attempts to merge encrypted
	# Ansible Vault files. Run this command to attempt a merge on the unencrypted
	# versions of the file. If there are conflicts, you will be given a chance to

	require "net/http"

	def start_server
	# Remove the X to enable the parameters for tuning.
	# These are the default values as of Ruby 2.2.0.
	@child = spawn(<<-EOC.split.join(" "))
	XRUBY_GC_HEAP_FREE_SLOTS=4096
	XRUBY_GC_HEAP_INIT_SLOTS=10000
	XRUBY_GC_HEAP_GROWTH_FACTOR=1.8
	XRUBY_GC_HEAP_GROWTH_MAX_SLOTS=0

	require "timeout"

	module WaitSteps
	extend RSpec::Matchers::DSL

	matcher :become_true do
	match do \|block\|
	begin
	Timeout.timeout(Capybara.default_wait_time) do
	sleep(0.1) until value = block.call

	# config/initializers/hacks.rb

	Dir[Rails.root.join("lib/hacks/*/.rb")].each { \|file\| require file }