How to edit Grub 2 menu entries in Ubuntu

To edit or remove the extra menu entries from the Grub 2 loader of the Ubuntu follow the given steps. You must write down the grub menu entries which have to be removed.
Open the terminal and enter the command
$sudo nautilus
A folder window will pop up , in that goto filesystem->boot->grub->grub.cfg.
In the appearing text box, search for  menuentry 'Ubuntu, with Linux 2.6.38-8-generic (recovery mode) or look for any other grub 2 menu entries as shown at Ubuntu startup.
Search for these codes in grub.cfg and delete them. It will remove grub menu entry Memory test
menuentry "Memory test (memtest86+, serial console 115200)" {
    insmod part_msdos
    insmod ext2
    set root='(hd0,msdos9)'
    search --no-floppy --fs-uuid --set=root d37cfb85-ee78-47ea-a5a0-bef79e548152
    linux16    /boot/memtest86+.bin console=ttyS0,115200n8

And delete all the text present between braces, {}.
Grub 2 menu edit entries

As shown in the image delete all the text along with the menu name from the text box. Similarly search for other menu entries of grub 2 and delete it.
After deleting these menu items restart your computer and you will find the grub menu entries are removed.
NOTE: Do not delete the menuentry 'Ubuntu, with Linux 2.6.38-10-generic
You will be unable to login to your Ubuntu!

Top 5 Anti virus for Ubuntu

Generally Ubuntu Linux is hardly effected by virus and the reason is its structure and strong community support, any loopholes are worked immediately. For every new virus, its solution is out within two hours thus preventing it to do any further damage. Linux antivirus are also effective against the Windows virus and they are removed if they enter your systems through external hard drive, internet etc.

Also see Top 10 FAQ about Linux and FOSS.  

Top 5 Ubuntu Linux antivirus I recommend are:

1. ClamAV Antivirus 
ClamAV is the most popular open source anti-virus software and it is available for both Ubuntu and Kubuntu. Its GUI interface is called Clamtk.
It can be install from the software center or in terminal type
$sudo apt-get install clamav clamtk

2. Free Avast Linux Home Edition
This is Free version of popular proprietary Antivirus Avast. It requires online  registration for 1 year use. It is not available for commercial use.
Download Avast Linux Home Edition and register here. Once you install it and run for the first time, you will be asked for the key.

3. AVG Antivirus 
This is another free antivirus available for Ubuntu. Download it here. AVG has over 110 million users. Once you install it, you need to start AVG with super user privileges. To do so open the terminal and type
$sudo avggui

4. F-PROT Antivirus 
It is available for all Linux workstations and has to installed from from .tar file. Download F-PROT. To install follow these steps:
     -> Extract the tar file.
     -> Open terminal and change drive to the extracted folder.
     -> Type sudo ./install and press Y to continue.
     -> Press Y for all other prompts and Enter.

5. BitDefender

It is another proprietary antivirus software available for Ubuntu for non-commercial use.
You have to add the repository.
System - Administration - Software Sources, click on the 'Other Software' (previously 'Third Party Software') tab. Now click on 'Add' and enter
deb bitdefender non-free  

Close and press Reload button.In terminal paste  the following command.
$sudo apt-key add bd.key.asc
To install the GUI type the following command in terminal.
$sudo apt-get install bitdefender-scanner-gui

Now access it from Applications ->System Tools -> BitDefender Scanner.

Give your feedbacks of your personal experience in comments below...

Installing Ubuntu classic in Ubuntu 11.10

If you are missing Ubuntu classic interface in Ubuntu 11.10 and want to activate it back, here is the one line command to get back the Ubuntu classic.

In the terminal type the following command -

$sudo apt-get install gnome-session-fallback

Restart  your system and select the Classic mode at login screen.

Install Ubuntu 11.10 and Windows dual boot installation

To install Ubuntu 11.10 dual boot on your system.

This Linux Ubuntu installation demo has been done on virtual machine (virtual Box) by installing Ubuntu inside windows 7.
But before installing Linux Ubuntu, you must see Things to remember before installing Ubuntu to make your Ubuntu installation a perfect one.. These notes are of great importance also for people switching from Windows to Linux dual boot or Ubuntu dual boot operating systems (OS).
A very similar procedure can be applied for installing other Linux based operating systems.

Boot through the Live CD or Live USB .Click Install Ubuntu.

Select first option for deleting all other OS and installing Ubuntu as the only OS. Select next option "Something else" for dual boot with window7, Vista & XP.

Select drive in which Ubuntu is to be installed and Click "New Partition table" to make a separate drive for Ubuntu. Empty any drive before through window to prevent data loss.

In this window specify the space you want for Ubuntu (at least 5GB). Select Location as "Beginning"select "Ext4 journaling file system" in "Use as" option. Select  Mount point  "/". It is use as root directory of Ubuntu. Click "OK".

Now Select the option for "Device for boot loader installation". Select the first option in the list. That will show the whole hard disk of your system.

You can also create a Swap partition for Ubuntu. This Swap area act as a physical memory. This is optional if you have large RAM memory. Select any partition and click on "New partition table".

 After creating the SWAP area. Click on "Install Now".

Before this window other window will appear asking for keyboard layout. Select the correct layout of your window in my case it is USA layout. In this window select the corresponding timezone. Now Click "Forward".

                                    Fill the form and click next.

And you are done.

The most common and general error occuring after installing Ubuntu is that of the missing Grub. You may get a blank screen when you restart your system which says "Grub rescue".
Don't panic. It is not the case of faulty Ubuntu installation, just follow the given link - Grub rescue.