Andrea Parisi devhero

## remove_non_breaking_space.rb
# prepare string
d = "foo\u00A0\bar"
=> "foo \bar"

# ruby >= 1.9
d.gsub("\u00A0", "")
=> "foo\bar"

# ruby 1.8
d.gsub(/\302\240/,"")

## ubuntu viewports switch keys
http://www.webupd8.org/2014/11/how-to-use-compiz-in-ubuntu-mate-1404.html

sudo apt-get install compiz compiz-plugins compizconfig-settings-manager

launch "compizconfig settings manager" => Ubuntu Unity Plugin => Switcher (allow disabling of Default Switchers):
  Switcher all viewports => <Alt>Tab
  Previous window Switcher all viewports => <Shift><Alt>Tab

## dumb file
http://www.dreamcreative.net/how-tos/guides-server-maintenance/how-to-create-a-dummy-file-in-linux/

dd if=/dev/zero of=dumb.dump bs=52428800 count=1

## ubuntu key mapper
http://askubuntu.com/questions/10008/how-to-make-keyboard-work-like-osx-system-wide

Install AutoKey (apt-get install autokey-gtk) and set a phrase to:

Phrase Text: <ctrl>+C (actually type out the <ctrl>+ here)
Paste Using: Keyboard
Abbreviation: None
Hotkey: <super>+v
Window Filter: None

## ubuntu_guest_additions.txt
http://ubuntuhandbook.org/index.php/2015/05/virtualbox-4-3-28-released-how-to-upgrade/

Install vagrant guest additions:
vagrant plugin install vagrant-vbguest

If you want to add VBox official Linux repository and receive future updates, do below steps:

1. Open terminal from the Dash or by pressing Ctrl+Alt+T. When it opens, run command to add VBox repository:

sudo sh -c 'echo "deb http://download.virtualbox.org/virtualbox/debian $(lsb_release -cs) contrib" >> /etc/apt/sources.list.d/virtualbox.list'

## vagrant broken networking
http://able.cd/b/2012/04/09/vagrant-broken-networking-when-packaging-ubuntu-boxes/
(https://github.com/jedi4ever/veewee/issues/970)

# SSH into running VM and remove the persistant network udev rules file:

sudo rm /etc/udev/rules.d/70-persistent-net.rules

# Shutdown the VM and package it:

vagrant halt && vagrant package

## ubunu disable home encryption
http://askubuntu.com/questions/4950/how-to-stop-using-built-in-home-directory-encryption

1 Backup the home directory while you are logged in:
  sudo cp -rp /home/user /home/user.backup
  [Check that your home backup has everything!!!]

2 switch to using root (another user account with sudo privileges would work equally well).

3 Delete your home directory rm -rf /home/user

## vagrant export box image
vagrant package --base $vbox_machine_name --output mybox.box

## win xp virtualbox missing ethernet
http://ubuntuforums.org/showthread.php?t=1106684

1.I shutdown Windows XP guest OS
2.Change Network Adpater to "Intel PRO/1000 MT Desktop"
3.Startup Windows XP Guest OS
4.Download driver from http://downloadcenter.intel.com/Detail_Desc.aspx?agr=Y&DwnldID=18717&lang=eng
5.Use "Shared Folders" on VirtualBox to share the driver to Guest OS
6.Install the driver.

## ruby parallel downloads
http://andrey.chernih.me/2014/05/29/downloading-multiple-files-in-ruby-simultaneously/

require 'net/http'

def download_net_http(urls, thread_count)
  queue = Queue.new
  urls.map { |url| queue << url }

  threads = thread_count.times.map do
    Thread.new do
	# prepare string
	d = "foo\u00A0\bar"
	=> "foo \bar"

	# ruby >= 1.9
	d.gsub("\u00A0", "")
	=> "foo\bar"

	# ruby 1.8
	d.gsub(/\302\240/,"")
	http://www.webupd8.org/2014/11/how-to-use-compiz-in-ubuntu-mate-1404.html

	sudo apt-get install compiz compiz-plugins compizconfig-settings-manager

	launch "compizconfig settings manager" => Ubuntu Unity Plugin => Switcher (allow disabling of Default Switchers):
	Switcher all viewports => <Alt>Tab
	Previous window Switcher all viewports => <Shift><Alt>Tab
	http://www.dreamcreative.net/how-tos/guides-server-maintenance/how-to-create-a-dummy-file-in-linux/

	dd if=/dev/zero of=dumb.dump bs=52428800 count=1
	http://askubuntu.com/questions/10008/how-to-make-keyboard-work-like-osx-system-wide

	Install AutoKey (apt-get install autokey-gtk) and set a phrase to:

	Phrase Text: <ctrl>+C (actually type out the <ctrl>+ here)
	Paste Using: Keyboard
	Abbreviation: None
	Hotkey: <super>+v
	Window Filter: None
	http://ubuntuhandbook.org/index.php/2015/05/virtualbox-4-3-28-released-how-to-upgrade/

	Install vagrant guest additions:
	vagrant plugin install vagrant-vbguest

	If you want to add VBox official Linux repository and receive future updates, do below steps:

	1. Open terminal from the Dash or by pressing Ctrl+Alt+T. When it opens, run command to add VBox repository:

	sudo sh -c 'echo "deb http://download.virtualbox.org/virtualbox/debian $(lsb_release -cs) contrib" >> /etc/apt/sources.list.d/virtualbox.list'
	http://able.cd/b/2012/04/09/vagrant-broken-networking-when-packaging-ubuntu-boxes/
	(https://github.com/jedi4ever/veewee/issues/970)

	# SSH into running VM and remove the persistant network udev rules file:

	sudo rm /etc/udev/rules.d/70-persistent-net.rules

	# Shutdown the VM and package it:

	vagrant halt && vagrant package
	http://askubuntu.com/questions/4950/how-to-stop-using-built-in-home-directory-encryption

	1 Backup the home directory while you are logged in:
	sudo cp -rp /home/user /home/user.backup
	[Check that your home backup has everything!!!]

	2 switch to using root (another user account with sudo privileges would work equally well).

	3 Delete your home directory rm -rf /home/user
	http://ubuntuforums.org/showthread.php?t=1106684

	1.I shutdown Windows XP guest OS
	2.Change Network Adpater to "Intel PRO/1000 MT Desktop"
	3.Startup Windows XP Guest OS
	4.Download driver from http://downloadcenter.intel.com/Detail_Desc.aspx?agr=Y&DwnldID=18717&lang=eng
	5.Use "Shared Folders" on VirtualBox to share the driver to Guest OS
	6.Install the driver.
	http://andrey.chernih.me/2014/05/29/downloading-multiple-files-in-ruby-simultaneously/

	require 'net/http'

	def download_net_http(urls, thread_count)
	queue = Queue.new
	urls.map { \|url\| queue << url }

	threads = thread_count.times.map do
	Thread.new do