Friday, July 24, 2015

How to install Ubuntu


Ubuntu  is an open source software platform that runs everywhere from the smartphone, the tablet and the PC to the server and the cloud.


Open source
Ubuntu has always been free to download, use and share. We believe in the power of open source software; Ubuntu could not exist without its worldwide community of voluntary developers.

Secure
With a built-in firewall and virus protection software, Ubuntu is one of the most secure operating systems around.

Unity Dash

The Dash allows you to search for applications, files, music, and videos, and shows you items that you have used recently. If you have ever worked on a spreadsheet or edited an image and forgot where you saved it, you will surely find this feature of the Dash to be useful.
To start using the Dash, click the top icon in the Launcher. This icon has the Ubuntu logo on it. For faster access, you can just press the Super key.
To hide the Dash, click the top icon again or press Super or Esc.



Ubuntu Desktop Edition ( minimum requirements)
  • 2GHz CPU (about Intel Celeron or better)
  • 2GB  RAM (minimun for Unity)
  • 8 GB of hard-drive space (or USB stick, memory card or external drive but see LiveCD for an alternative approach)
  • VGA capable of 1024x768 screen resolution.
  • Either a CD/DVD drive or a USB port for the installer media.


How to install Ubuntu :

Download the Ubuntu ISO from http://www.ubuntu.com/getubuntu/download and save to your desktop
Burn the ISO image to a blank CD/DVD using  freeisoburner
or  
Download UnetBootin. UNetbootin allows for the installation of various Linux/Ubuntu distributions to a partition or USB drive.




Select the "DiskImage"  button. Now click on the button with three dots on it.

Make sure that you have inserted your USB drive and make sure the "Drive:" dropdown box is pointing at your USB drive.

Click "OK" to start installing to the USB drive.

Note: If the drive is not blank to begin with that UNetbootin will not wipe the drive first. Format the drive yourself before you start.


Ubuntu can be installed on one ore more SSD/HDD . We will take a look at how to proceed through the installation using (A) one SSD/HDD  and (B) Using SSD for boot,root and HDD for home partition
In my current configuration for my laptop I am using an 30GB SSD for /boot and / (root) and 
/home is installed on my 500GB HDD (this was the stock HDD that came with the laptop but i've  replaced it with a 120GB SSD) . After my DVD-writer went out i decided to trade it in for more storage and faster boot times, so i ended up purchasing 2nd HDD Caddy and an SSD. Using this configuration the operating system will be installed on the SSD and the software and games will be installed on the HDD.(Using 2 drives can increase power consumption which can result in shorter battery life ,i have upgraded mine to a 12 cell extended battery and it lasts  ~5 hours )




After booting the livecd or liveusb select the option install ubuntu .










(A)




If you are using just one drive select the option erase disk and install  Ubuntu 
and check the boxes to "encrypt the new installation for security" as well as 
"use LVM for the new ubuntu installation" and proceed with the installation . 





 (B) If you are using two or more drives you will need to configure your partitions manually . Creating a /boot partition is optional . A swap partition is optional on a system with more then 4GB ram . Having a swap partition can increase stability on a system with small amounts of RAM but will increase disk wear .The partitions we will be creating will be in ext4 format . 


If there is no operating system present we will use the option  new partition tabel :





If you already have an operating system installed use the "-" button to delete the partitions and use "+" button to create new ones . The partition layout should look something like this :




Device for bootloader installation should always be your SSD. 
The root partition is represented by "/" . This partition should be created on your SSD
The home partition is represented by"/home".This partition should be created on your HDD
For systems with low amounts of RAM:
Create a swap partition preferably on your HDD. The swap partiotion will be represente by "/swap", the size of it will depend on individual needs .


Proceed with the installation by clicking "Install now". 


Create a username name and password .
Wait until the installation finishes and reboot your computer .