Terry Wang terrywang

Rails startup with bundler, rvm and specific user

e.g. for user stefan, starting two different applications, located under /apps/APPLICATION/prod/current.

This script is very useful, because it is run at startup of server, so no 503 anymore.

Put this script under /etc/init.d/ and make it executable chmod +x /etc/init.d/rails_apps

Locate the section for your github remote in the .git/config file. It looks like this:

[remote "origin"]
	fetch = +refs/heads/*:refs/remotes/origin/*
	url = git@github.com:joyent/node.git

Now add the line fetch = +refs/pull/*/head:refs/remotes/origin/pr/* to this section. Obviously, change the github url to match your project's URL. It ends up looking like this:

nginx configuration:

user root admin;

worker_processes  1;

# pid of nginx master process
pid /var/run/nginx.pid;

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

	#!/bin/bash

	# https://gist.github.com/dcai/3847582/

	[[ -r /etc/bash_completion ]] && source /etc/bash_completion

	# TERM COLOR
	export WHITE="\033[1;37m"
	export YELLOW="\033[1;33m"
	export GREEN="\033[1;32m"

	# Author: Dongsheng Cai
	#
	# Gist: https://gist.github.com/dcai/3824286
	#
	# c-d to close shell
	# <prefix> s to switch to another session
	# <prefix> f to find a window
	# <prefix> o to switch to another panel
	# <prefix> ! to close other panes except current one
	# <prefix> x Kill the current pane

	___
	,'._,`.
	(-.___.-)
	(-.___.-)
	`-.___.-'
	(( @ @\| . __
	\ ` \| ,\ \|`. @\| \| \| _.-._
	__`.`=-=mm===mm:: \| \| \|`. \| \| \| ,'=` '=`.
	( `-'\|:/ /:/ `/ @\| \| \| \|, @\| @\| /---)W(---\
	\ \ / / / / @\| \| ' (----\| \|----) ,~

	#!/bin/bash

	# bootstrap ruby on a fresh RHEL6.0

	# Rackspace appears to mount /tmp as `noexec` which
	# doesn't allow ruby-build to install ruby (since packages)
	# downloaded can't be executed from /tmp so reassign
	# the tmp directory
	if [ ! -d "$HOME/tmp" ]; then
	mkdir "$HOME/tmp"

	#!/usr/bin/env python

	import atexit
	import datetime
	from datetime import timedelta
	import logging
	import os
	import smtplib
	import subprocess as sub
	import sys