devhero

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

devhero

sudo su postgres

# BACKUP
vacuumdb -U postgres --full --analyze --dbname $DBNAME && pg_dump $DBNAME -Ft -v -U postgres -f /tmp/$DBNAME.tar

# RENAME TARGET DB
psql
alter database $T_DBNAME rename to NEWNAME

# OR DROP TARGET DB

devhero

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

devhero

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

devhero

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'

devhero

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

devhero

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

devhero

vagrant package --base $vbox_machine_name --output mybox.box

devhero

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. 

devhero

http://stackoverflow.com/questions/6241384/how-do-i-manage-ruby-threads-so-they-finish-all-their-work


require 'thread'
require 'thwait'

threads = []
threads << Thread.new { }
threads << Thread.new { }
ThreadsWait.all_waits(*threads)