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  NSString* path=[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
  path=[path stringByAppendingPathComponent:@"Downloads"];
  
  NSString *filename = nil;
  NSDictionary *attrs = nil;
  NSDirectoryEnumerator* dirEnum = [[NSFileManager defaultManager] enumeratorAtPath:path];
  [dirEnum skipDescendants];
  while (filename = [dirEnum nextObject]) {
    
    NSUInteger level = [dirEnum level];

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df | awk 'NR==2' | awk '{print int($3/$4 * 100)}'

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# yum install gmp-devel

# vim /etc/yum.repos.d/epel.repo
---
[epel]
name=RHEL 6 - epel - $releasever - $basearch
baseurl=http://download.fedoraproject.org/pub/epel/beta/6/$basearch/
gpgcheck=0
enabled=1
priority=1

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# sudo su

// install apache
# yum -y install httpd

// install develop tools for installing ghc
# yum -y install gcc

// install ghc 7.4.2
# wget http://www.haskell.org/ghc/dist/7.4.2/ghc-7.4.2-x86_64-unknown-linux.tar.bz2

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ifconfig en0 | awk 'NR==5' | cut -d ' ' -f 2

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// memory usage percent (integral)
free | awk 'NR==2' | awk '{print int($3/$2*100)}'

// actual memory usage (integral)
// http://open-groove.net/linux-command/free/
free | awk 'NR==2' | awk '{print int(($3-($6+$7))/$2*100)}'

// swap memory usage percent (integral)
free | awk 'NR==4' | awk '{print int($3/$2*100)}'

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# cpu usage (decimal)
cat /proc/loadavg | cut -d ' ' -f 1 

# cpu usage (integral)
cat /proc/loadavg | cut -d ' ' -f 1 | cut -d '.' -f 1

# cpu usage (integral * 100)
cpu=`cat /proc/loadavg | cut -d ' ' -f 1`;echo $cpu*100 | bc | cut -d '.' -f 1

# send your cpu usage (integral) to GrowthForecast every 5 minutes via crontab

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$ sudo yum groupinstall "Development Tools"
$ sudo yum install pkgconfig glib2-devel gettext libxml2-devel pango-devel cairo-devel

$ cd /usr/bin/
$ sudo curl -LOk http://xrl.us/cpanm
$ sudo chmod +x cpanm
 
$ sudo cpanm local::lib
 
-> FAIL Installing ExtUtils::MakeMaker failed. See /root/.cpanm/build.log for details.

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$ cd /usr/bin/
$ sudo curl -LOk http://xrl.us/cpanm
$ sudo chmod +x cpanm

$ sudo cpanm local::lib

-> FAIL Installing ExtUtils::MakeMaker failed. See /root/.cpanm/build.log for details.
-> FAIL Bailing out the installation for App-cpanminus-1.5018. Retry with --prompt or --force.

$ sudo yum install perl-devel

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<?php

namespace Fuel\Migrations;

class Create_users
{
  public function up()
	{
		\DBUtil::create_table('users', array(
			'id' => array('constraint' => 11, 'type' => 'int', 'auto_increment' => true),