How To Install Virtualbox On Ubuntu

Quick & easy Guide:

$ sudo add-apt-repository ppa:dreibh/ppa
$ sudo apt-get update
$ sudo apt-get install virtualbox

Reset Root Password in Ubuntu

To enable the root account and reset the password type:

sudo passwd -u root

Create bootable Live USB - unetbootin

Introduction

UNetbootin allows you to create bootable Live USB drives for Ubuntu, Fedora, and other Linux distributions without burning a CD. It runs on Windows, Linux, and Mac OS X. You can either let UNetbootin download one of the many distributions supported out-of-the-box for you, or supply your own Linux .iso file if you've already downloaded one or your preferred distribution isn't on the list.

Requirements

• Microsoft Windows 2000/XP/Vista/7, or Linux, or Mac OS X 10.5+. Note that resulting USB drives are bootable only on PCs (not on Macs).
• Internet access for downloading a distro to install, or a pre-downloaded ISO file

Features

UNetbootin can create a bootable Live USB drive, or it can make a "frugal install" on your local hard disk if you don't have a USB drive. It loads distributions either by downloading a ISO (CD image) files for you, or by using an ISO file you've already downloaded. 

Download: http://unetbootin.sourceforge.net

How to Login as Root in Ubuntu

1. sudo passwd root

2. sudo sh -c 'echo "greeter-show-manual-login=true" >> /etc/lightdm/lightdm.conf.d/50-unity-greeter.conf' 

3. reboot the system

Install Adobe Flash Player on Ubuntu

1. Open a terminal window

2. Type in the following commands then hit Enter after each.

sudo apt-get update

sudo apt-get install flashplugin-installer

CentOS / Ubuntu Time Zone issue resolve

To know when your clock is going to change:

zdump -v /etc/localtime | grep 2013

To install the update Time zone:

yum install tzdata

TUI to configure zone:

tzselect

Importent Path to know:

/usr/share/zoneinfo

/etc/sysconfig/clock

/etc/localtime

**Fix to Ubuntu in old version:

#Ubuntu has an open bug:

#https://bugs.launchpad.net/ubuntu/+source/tzdata/+bug/1158834

#Until fixed:

#Check if the settings are right:

zdump -v /etc/localtime | grep 2013

#If wrong:

mkdir $HOME/dstfix2013

cd $HOME/dstfix2013

wget -N ftp://ftp.iana.org/tz/data/asia

sudo zic asia

sudo ln -sf /usr/share/zoneinfo/Asia/Jerusalem /usr/share/zoneinfo/Asia/Tel_Aviv

# reconfigure the system to use the new zone files

sudo dpkg-reconfigure tzdata

# Check again

zdump -v /etc/localtime | grep 2013

Running Evolution with Exchange 2007

The Evolution MAPI provider adds support for Microsoft Exchange, including Exchange 2007, to the Evolution groupware suite, using the proprietary MAPI protocol. Unlike the Exchange connector (in the evolution-exchange package), it does not use Outlook Web Access and requires direct access to the Exchange server. (dpkg package description)
To install this package in Ubuntu,

$ sudo apt-get install evolution-mapi

You can use dpkg to know more about evolution-mapi after installing it

$ dpkg -s evolution-mapi