cd /tmp
wget http://redis.googlecode.com/files/redis-2.2.12.tar.gz
tar -zxf redis-2.2.12.tar.gz
cd redis-2.2.12
make
sudo make install

It will install in global:

mkdir -p /usr/local/bin
cp -p redis-server /usr/local/bin
cp -p redis-benchmark /usr/local/bin
cp -p redis-cli /usr/local/bin
cp -p redis-check-dump /usr/local/bin
cp -p redis-check-aof /usr/local/bin

Step 2. create redis-server in /etc/init.d/:

#! /bin/sh
### BEGIN INIT INFO
# Provides:		redis-server
# Required-Start:	$syslog $remote_fs
# Required-Stop:	$syslog $remote_fs
# Should-Start:		$local_fs
# Should-Stop:		$local_fs
# Default-Start:	2 3 4 5
# Default-Stop:		0 1 6
# Short-Description:	redis-server - Persistent key-value db
# Description:		redis-server - Persistent key-value db
### END INIT INFO

PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
DAEMON=/usr/local/bin/redis-server
DAEMON_ARGS=/etc/redis/redis.conf
NAME=redis-server
DESC=redis-server
PIDFILE=/var/run/redis.pid

test -x $DAEMON || exit 0

set -e

case "$1" in
  start)
	echo -n "Starting $DESC: "
	touch $PIDFILE
	chown redis:redis $PIDFILE
	if start-stop-daemon --start --quiet --umask 007 --pidfile $PIDFILE --chuid redis:redis --exec $DAEMON -- $DAEMON_ARGS
	then
		echo "$NAME."
	else
		echo "failed"
	fi
	;;
  stop)
	echo -n "Stopping $DESC: "
	if start-stop-daemon --stop --retry 10 --quiet --oknodo --pidfile $PIDFILE --exec $DAEMON
	then
		echo "$NAME."
	else
		echo "failed"
	fi
	rm -f $PIDFILE
	;;

  restart|force-reload)
	${0} stop
	${0} start
	;;

  status)
	echo -n "$DESC is "
	if start-stop-daemon --stop --quiet --signal 0 --name ${NAME} --pidfile ${PIDFILE}
	then
		echo "running"
	else
		echo "not running"
		exit 1
	fi
	;;

  *)
	echo "Usage: /etc/init.d/$NAME {start|stop|restart|force-reload}" >&2
	exit 1
	;;
esac

exit 0

this file must be executable

sudo chmod +x /etc/init.d/redis-server

Step 3. create redis.conf in /etc/redis/

sudo mkdir -p /etc/redis

# this file goes to /etc/redis/
# Redis configuration file example

# Note on units: when memory size is needed, it is possible to specifiy
# it in the usual form of 1k 5GB 4M and so forth:
#
# 1k => 1000 bytes
# 1kb => 1024 bytes
# 1m => 1000000 bytes
# 1mb => 1024*1024 bytes
# 1g => 1000000000 bytes
# 1gb => 1024*1024*1024 bytes
#
# units are case insensitive so 1GB 1Gb 1gB are all the same.

# By default Redis does not run as a daemon. Use 'yes' if you need it.
# Note that Redis will write a pid file in /var/run/redis.pid when daemonized.
daemonize yes

# When running daemonized, Redis writes a pid file in /var/run/redis.pid by
# default. You can specify a custom pid file location here.
pidfile /var/run/redis.pid

# Accept connections on the specified port, default is 6379
port 6379

# If you want you can bind a single interface, if the bind option is not
# specified all the interfaces will listen for incoming connections.
#
bind 127.0.0.1

# Close the connection after a client is idle for N seconds (0 to disable)
timeout 300

# Set server verbosity to 'debug'
# it can be one of:
# debug (a lot of information, useful for development/testing)
# verbose (many rarely useful info, but not a mess like the debug level)
# notice (moderately verbose, what you want in production probably)
# warning (only very important / critical messages are logged)
loglevel verbose

# Specify the log file name. Also 'stdout' can be used to force
# Redis to log on the standard output. Note that if you use standard
# output for logging but daemonize, logs will be sent to /dev/null
logfile /var/log/redis/redis-server.log

# Set the number of databases. The default database is DB 0, you can select
# a different one on a per-connection basis using SELECT  where
# dbid is a number between 0 and 'databases'-1
databases 16

################################ SNAPSHOTTING  #################################
#
# Save the DB on disk:
#
#   save
#
#   Will save the DB if both the given number of seconds and the given
#   number of write operations against the DB occurred.
#
#   In the example below the behaviour will be to save:
#   after 900 sec (15 min) if at least 1 key changed
#   after 300 sec (5 min) if at least 10 keys changed
#   after 60 sec if at least 10000 keys changed
#
#   Note: you can disable saving at all commenting all the "save" lines.

save 900 1
save 300 10
save 60 10000

# Compress string objects using LZF when dump .rdb databases?
# For default that's set to 'yes' as it's almost always a win.
# If you want to save some CPU in the saving child set it to 'no' but
# the dataset will likely be bigger if you have compressible values or keys.
rdbcompression yes

# The filename where to dump the DB
dbfilename dump.rdb

# The working directory.
#
# The DB will be written inside this directory, with the filename specified
# above using the 'dbfilename' configuration directive.
#
# Also the Append Only File will be created inside this directory.
#
# Note that you must specify a directory here, not a file name.
dir /var/lib/redis

################################# REPLICATION #################################

# Master-Slave replication. Use slaveof to make a Redis instance a copy of
# another Redis server. Note that the configuration is local to the slave
# so for example it is possible to configure the slave to save the DB with a
# different interval, or to listen to another port, and so on.
#
# slaveof  

# If the master is password protected (using the "requirepass" configuration
# directive below) it is possible to tell the slave to authenticate before
# starting the replication synchronization process, otherwise the master will
# refuse the slave request.
#
# masterauth 

################################## SECURITY ###################################

# Require clients to issue AUTH  before processing any other
# commands.  This might be useful in environments in which you do not trust
# others with access to the host running redis-server.
#
# This should stay commented out for backward compatibility and because most
# people do not need auth (e.g. they run their own servers).
#
# Warning: since Redis is pretty fast an outside user can try up to
# 150k passwords per second against a good box. This means that you should
# use a very strong password otherwise it will be very easy to break.
#
# requirepass foobared

################################### LIMITS ####################################

# Set the max number of connected clients at the same time. By default there
# is no limit, and it's up to the number of file descriptors the Redis process
# is able to open. The special value '0' means no limits.
# Once the limit is reached Redis will close all the new connections sending
# an error 'max number of clients reached'.
#
# maxclients 128

# Don't use more memory than the specified amount of bytes.
# When the memory limit is reached Redis will try to remove keys with an
# EXPIRE set. It will try to start freeing keys that are going to expire
# in little time and preserve keys with a longer time to live.
# Redis will also try to remove objects from free lists if possible.
#
# If all this fails, Redis will start to reply with errors to commands
# that will use more memory, like SET, LPUSH, and so on, and will continue
# to reply to most read-only commands like GET.
#
# WARNING: maxmemory can be a good idea mainly if you want to use Redis as a
# 'state' server or cache, not as a real DB. When Redis is used as a real
# database the memory usage will grow over the weeks, it will be obvious if
# it is going to use too much memory in the long run, and you'll have the time
# to upgrade. With maxmemory after the limit is reached you'll start to get
# errors for write operations, and this may even lead to DB inconsistency.
#
# maxmemory 

############################## APPEND ONLY MODE ###############################

# By default Redis asynchronously dumps the dataset on disk. If you can live
# with the idea that the latest records will be lost if something like a crash
# happens this is the preferred way to run Redis. If instead you care a lot
# about your data and don't want to that a single record can get lost you should
# enable the append only mode: when this mode is enabled Redis will append
# every write operation received in the file appendonly.aof. This file will
# be read on startup in order to rebuild the full dataset in memory.
#
# Note that you can have both the async dumps and the append only file if you
# like (you have to comment the "save" statements above to disable the dumps).
# Still if append only mode is enabled Redis will load the data from the
# log file at startup ignoring the dump.rdb file.
#
# IMPORTANT: Check the BGREWRITEAOF to check how to rewrite the append
# log file in background when it gets too big.

appendonly no

# The name of the append only file (default: "appendonly.aof")
# appendfilename appendonly.aof

# The fsync() call tells the Operating System to actually write data on disk
# instead to wait for more data in the output buffer. Some OS will really flush
# data on disk, some other OS will just try to do it ASAP.
#
# Redis supports three different modes:
#
# no: don't fsync, just let the OS flush the data when it wants. Faster.
# always: fsync after every write to the append only log . Slow, Safest.
# everysec: fsync only if one second passed since the last fsync. Compromise.
#
# The default is "everysec" that's usually the right compromise between
# speed and data safety. It's up to you to understand if you can relax this to
# "no" that will will let the operating system flush the output buffer when
# it wants, for better performances (but if you can live with the idea of
# some data loss consider the default persistence mode that's snapshotting),
# or on the contrary, use "always" that's very slow but a bit safer than
# everysec.
#
# If unsure, use "everysec".

# appendfsync always
appendfsync everysec
# appendfsync no

################################ VIRTUAL MEMORY ###############################

# Virtual Memory allows Redis to work with datasets bigger than the actual
# amount of RAM needed to hold the whole dataset in memory.
# In order to do so very used keys are taken in memory while the other keys
# are swapped into a swap file, similarly to what operating systems do
# with memory pages.
#
# To enable VM just set 'vm-enabled' to yes, and set the following three
# VM parameters accordingly to your needs.

vm-enabled no
# vm-enabled yes

# This is the path of the Redis swap file. As you can guess, swap files
# can't be shared by different Redis instances, so make sure to use a swap
# file for every redis process you are running. Redis will complain if the
# swap file is already in use.
#
# The best kind of storage for the Redis swap file (that's accessed at random)
# is a Solid State Disk (SSD).
#
# *** WARNING *** if you are using a shared hosting the default of putting
# the swap file under /tmp is not secure. Create a dir with access granted
# only to Redis user and configure Redis to create the swap file there.
vm-swap-file /var/lib/redis/redis.swap

# vm-max-memory configures the VM to use at max the specified amount of
# RAM. Everything that deos not fit will be swapped on disk *if* possible, that
# is, if there is still enough contiguous space in the swap file.
#
# With vm-max-memory 0 the system will swap everything it can. Not a good
# default, just specify the max amount of RAM you can in bytes, but it's
# better to leave some margin. For instance specify an amount of RAM
# that's more or less between 60 and 80% of your free RAM.
vm-max-memory 0

# Redis swap files is split into pages. An object can be saved using multiple
# contiguous pages, but pages can't be shared between different objects.
# So if your page is too big, small objects swapped out on disk will waste
# a lot of space. If you page is too small, there is less space in the swap
# file (assuming you configured the same number of total swap file pages).
#
# If you use a lot of small objects, use a page size of 64 or 32 bytes.
# If you use a lot of big objects, use a bigger page size.
# If unsure, use the default 
vm-page-size 32

# Number of total memory pages in the swap file.
# Given that the page table (a bitmap of free/used pages) is taken in memory,
# every 8 pages on disk will consume 1 byte of RAM.
#
# The total swap size is vm-page-size * vm-pages
#
# With the default of 32-bytes memory pages and 134217728 pages Redis will
# use a 4 GB swap file, that will use 16 MB of RAM for the page table.
#
# It's better to use the smallest acceptable value for your application,
# but the default is large in order to work in most conditions.
vm-pages 134217728

# Max number of VM I/O threads running at the same time.
# This threads are used to read/write data from/to swap file, since they
# also encode and decode objects from disk to memory or the reverse, a bigger
# number of threads can help with big objects even if they can't help with
# I/O itself as the physical device may not be able to couple with many
# reads/writes operations at the same time.
#
# The special value of 0 turn off threaded I/O and enables the blocking
# Virtual Memory implementation.
vm-max-threads 4

############################### ADVANCED CONFIG ###############################

# Glue small output buffers together in order to send small replies in a
# single TCP packet. Uses a bit more CPU but most of the times it is a win
# in terms of number of queries per second. Use 'yes' if unsure.
glueoutputbuf yes

# Hashes are encoded in a special way (much more memory efficient) when they
# have at max a given numer of elements, and the biggest element does not
# exceed a given threshold. You can configure this limits with the following
# configuration directives.
hash-max-zipmap-entries 64
hash-max-zipmap-value 512

# Active rehashing uses 1 millisecond every 100 milliseconds of CPU time in
# order to help rehashing the main Redis hash table (the one mapping top-level
# keys to values). The hash table implementation redis uses (see dict.c)
# performs a lazy rehashing: the more operation you run into an hash table
# that is rhashing, the more rehashing "steps" are performed, so if the
# server is idle the rehashing is never complete and some more memory is used
# by the hash table.
#
# The default is to use this millisecond 10 times every second in order to
# active rehashing the main dictionaries, freeing memory when possible.
#
# If unsure:
# use "activerehashing no" if you have hard latency requirements and it is
# not a good thing in your environment that Redis can reply form time to time
# to queries with 2 milliseconds delay.
#
# use "activerehashing yes" if you don't have such hard requirements but
# want to free memory asap when possible.
activerehashing yes

################################## INCLUDES ###################################

# Include one or more other config files here.  This is useful if you
# have a standard template that goes to all redis server but also need
# to customize a few per-server settings.  Include files can include
# other files, so use this wisely.
#
# include /path/to/local.conf
# include /path/to/other.conf

add a member redis to the system:

sudo useradd redis

prepare log folder (ref)

sudo mkdir -p /var/lib/redis
sudo mkdir -p /var/log/redis
sudo chown redis:redis /var/lib/redis
sudo chown redis:redis /var/log/redis

Step 4. add monit support: /etc/monit/conf.d/redis-server.monitrc

check process redis-server
    with pidfile "/var/run/redis.pid"
    start program = "/etc/init.d/redis-server start"
    stop program = "/etc/init.d/redis-server stop"
    if 2 restarts within 3 cycles then timeout
    if totalmem > 100 Mb then alert
    if children > 255 for 5 cycles then stop
    if cpu usage > 95% for 3 cycles then restart
    if failed host 127.0.0.1 port 6379 then restart
  	if 5 restarts within 5 cycles then timeout

Now, start redis-server:

sudo /etc/init.d/redis-server start

if you want redis start/stop at default runlevel

sudo update-rc.d redis-server defaults

This script can monitor cpu/memory usage of your node application, and start/stop it via a web interface or command line

Step 1. install startup and monit (they are normally preinstalled in ubuntu)

sudo apt-get install upstart monit

then edit /etc/defaults/monit, set startup=1

Step 2. in /etc/init/, create a config of your application, ex: your_app.conf with code

#!upstart

description "your_app"
author "Hongbo LU"

start on (local-filesystems and net-device-up IFACE=eth0)
stop on runlevel 0

respawn # restart when job dies
respawn limit 5 60 # give up restart after 5 respawns in 60 seconds

script  

exec start-stop-daemon --start --make-pidfile --pidfile /var/run/your_app.pid --chdir /path/to/your/app --chuid user:usergroup --exec NODE_ENV=production /usr/local/bin/node index.js >> /var/log/nodejs/node.log 2>&1

end script

NOTICE:

• user:usergroup must be the one who owns Node
• modify the log folder as you wish
• in order to use relative paths in Node, we must change directory to project’s folder

Step 3. edit file /etc/monit/monitrc, enable web interface

include /etc/monit/conf.d/*
set daemon 120 # Poll at 2-minute intervals
set logfile syslog facility log_daemon
set alert youremail@email.com
set httpd port 2812 and use address localhost
allow localhost   # Allow localhost to connect
allow admin:Monit # Allow Basic Auth

Step 4. create file /etc/monit/conf.d/your_app.monitrc

check process plusnode
    with pidfile "/var/run/your_app.pid"
    start program = "/sbin/start your_app"
    stop program = "/sbin/stop your_app"
    if 2 restarts within 3 cycles then timeout
    if totalmem > 100 Mb then alert
    if children > 255 for 5 cycles then stop
    if cpu usage > 95% for 3 cycles then restart
    if failed port 80 protocol http
	request /valid_url/
	with timeout 5 seconds
    and if failed port 443 type tcpssl protocol http
        request /valid_url/
        with timeout 5 seconds
	then restart

NOTICE:

• modify your_app as you wish
• modify server port as you wish
• monit will try to reach localhost:8080/valid_url to check the server status, so make sure your valid_url is valid

Step 5. now you can control your app. via web interface: localhost:2812 or via command:

#upstart command
sudo start your_app
sudo status your_app
sudo stop your_app
#the commands above are shortcuts of initctl:
initctl start your_app
initctl status your_app
#to check if the upstart conf is valid
initctl check-config
#to reload upstart configs
initctl reload-configuration
#monit command
sudo monit
sudo monit start your_app

NOTICE:

• if your app. stopped, monit will restart it automatically.

// Use this header instruction to fix 404 headers
// produced by url rewriting...
header('HTTP/1.1 200 OK');

// Page was not found:
header('HTTP/1.1 404 Not Found');

// Access forbidden:
header('HTTP/1.1 403 Forbidden');

// The page moved permanently should be used for
// all redrictions, because search engines know
// what's going on and can easily update their urls.
header('HTTP/1.1 301 Moved Permanently');

// Server error
header('HTTP/1.1 500 Internal Server Error');

// Redirect to a new location:
header('Location: http://www.example.org/');

// Redriect with a delay:
header('Refresh: 10; url=http://www.example.org/');
print 'You will be redirected in 10 seconds';

// you can also use the HTML syntax:
// <meta http-equiv="refresh" content="10;http://www.example.org/ />

// override X-Powered-By value
header('X-Powered-By: PHP/4.4.0');
header('X-Powered-By: Brain/0.6b');

// content language (en = English)
header('Content-language: en');

// last modified (good for caching)
$time = time() - 60; // or filemtime($fn), etc
header('Last-Modified: '.gmdate('D, d M Y H:i:s', $time).' GMT');

// header for telling the browser that the content
// did not get changed
header('HTTP/1.1 304 Not Modified');

// set content length (good for caching):
header('Content-Length: 1234');

// Headers for an download:
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename="example.zip"');
header('Content-Transfer-Encoding: binary');
// load the file to send:
readfile('example.zip');

// Disable caching of the current document:
header('Cache-Control: no-cache, no-store, max-age=0, must-revalidate');
header('Expires: Mon, 26 Jul 1997 05:00:00 GMT'); // Date in the past
header('Pragma: no-cache');

// set content type:
header('Content-Type: text/html; charset=iso-8859-1');
header('Content-Type: text/html; charset=utf-8');
header('Content-Type: text/plain'); // plain text file
header('Content-Type: image/jpeg'); // JPG picture
header('Content-Type: application/zip'); // ZIP file
header('Content-Type: application/pdf'); // PDF file
header('Content-Type: audio/mpeg'); // Audio MPEG (MP3,...) file
header('Content-Type: application/x-shockwave-flash'); // Flash animation

// show sign in box
header('HTTP/1.1 401 Unauthorized');
header('WWW-Authenticate: Basic realm="Top Secret"');
print 'Text that will be displayed if the user hits cancel or ';
print 'enters wrong login data';

demo can be found here: YUI Api Doc

Feature:

• Ajax based explorer, easy to navigate
• Multi-languages support.
• use SyntaxHighlighter to highlight syntax

It has some performance issue in Firefox < 4 for huge project (like YUI), and IE <9 is not supported (well, not tested )

your feedback is much appreciated

source code can be found here: theme-darktalker

(float)microtime(true);

To get unique timestampe:

function uniqueTimeStamp()
    {
        $Asec = explode(" ", microtime());
        $Amicro = explode(".", $Asec[0]);
        return ($Asec[1] . substr($Amicro[1], 0, 4));
    }

class test{
private $a = 'test';
public function foo($data){
   $a = $this->a;
   function nested($matches){
        return $matches[1].$a;
   }
   preg_replace_callback('/href=(.*?)/i','nested',$data);
}
}

what you have to do is like this:

class test{
private $a = 'test';
public function foo($data){
   $a = $this->a;
   $nested = function nested($matches){
        return $matches[1].$a;
   }
   preg_replace_callback('/href=(.*?)/i',array(get_class($this), 'bar'),$data);
}
private function bar($matches){
   return $matches[1].$this->a;
}
}

/**
 * trigger a DOM event via script
 * @param {Object,String} element a DOM node/node id
 * @param {String} event a given event to be fired - click,dblclick,mousedown,etc.
 */
var fireEvent = function(element, event) {
    var evt;
    var isString = function(it) {
        return typeof it == "string" || it instanceof String;
    }
    element = (isString(element)) ? document.getElementById(element) : element;
    if (document.createEventObject) {
        // dispatch for IE
        evt = document.createEventObject();
        return element.fireEvent('on' + event, evt)
    }
    else {
        // dispatch for firefox + others
        evt = document.createEvent("HTMLEvents");
        evt.initEvent(event, true, true); // event type,bubbling,cancelable
        return !element.dispatchEvent(evt);
    }
}

usage:

fireEvent("node_id","click");

1. create a php file search_index.php at your magento’s root folder

require_once 'app/Mage.php';
umask( 0 );
Mage :: app( "admin" );
Mage::log("Started Rebuilding Search Index At: " . date("d/m/y h:i:s"));
//define your table prefix
$tablePrefix = "magento_";
$sql = "truncate $tablePrefix.catalogsearch_fulltext;";
$mysqli = Mage::getSingleton('core/resource')->getConnection('core_write');
$mysqli->query($sql);
$process = Mage::getModel('index/process')->load(7);
$process->reindexAll();
Mage::log("Finished Rebuilding Search Index At: " . date("d/m/y h:i:s"));

2. execute it

TIP: if you are having trouble of initializing indexer but you still want to do it while finding the problem, you can comment these lines temporarily in /app/code/core/Mage/Index/Model/Process.php

public function reindexAll()
    {
       //comment these lines
        //if ($this->isLocked()) {
           // Mage::throwException(Mage::helper('index')->__('%s Index proces is working now. Please try run this process later.', $this->getIndexer()->getName()));
        //}
        $this->_getResource()->startProcess($this);
        $this->lock();
        $this->getIndexer()->reindexAll();
        $this->unlock();
        $this->_getResource()->endProcess($this);
    }

Configure Apache authentication

        Options Indexes MultiViews FollowSymLinks
        AllowOverride all
        AuthName "Private Access"
        AuthType Basic
        AuthUserFile /etc/apache2/passwd.htpasswd
        Require valid-user

Setup a user password:

# Touch the file to create it
# It'll save you accidentally wiping out your passwords using the -c option to htpaswd.
touch /etc/apache2/passwd.htpasswd
# Run this command once for each user you want to grant access to the store.
# Put your desired name in place of 'your_name', obviously.
sudo htpasswd /etc/apache2/passwd.htpasswd your_name
# Lock the file down
sudo chown root.root /etc/apache2/passwd.htpasswd
sudo chmod 644 /etc/apache2/passwd.htpasswd

Restart apache

sudo /etc/init.d/apache2 restart

function loadImage(src,callback){
var img = new Image();
    img.onload = function() {
      if (callback) {
         callback(img);
       }
   }
 img.src = src;
}

NOTICE: onload callback should be set before setting src