My First Experience with GRUB

Hi Friends. So, here I am again there with my experience and I think my GRUB experience (till now) would be an amazing topic

So let us start from the start πŸ™‚

What is GRUB ?

GRUB is a boot loader designed to boot a wide range of operating systems from a wide range of file systems. (copied :-p)

GRUB creates and manages the screen containing list of OS available in the system that we see while booting process. (in simple language)

Why I felt the need to change GRUB boot loader?

1. To make the boot menu visible

When Xen hypervisor is installed in Ubuntu 14.04 or higher versions it automatically changes the GRUB to boot XEN and hides the OS list menu on boot. So, if you want the menu to appear on boot then follow the steps :

Open /etc/default/grub and change GRUB_HIDDEN_TIMEOUT

GRUB_HIDDEN_TIMEOUT=-1

And then update your grub by running the following command

update-grub2

and on next boot you will see the boot menu πŸ™‚

2. To pass boot parameters to Xen

I have to change the scheduler in Xen to credit2 scheduler and for that I have to pass the parameters to Xen kernel.

Open /etc/default/grub and append the following line at the end

GRUB_CMDLINE_XEN=”sched=credit2″

And update your grub

update-grub2

So to pass parameters to Xen Kernel you just have to insert parameters between ” ”

Example

GRUB_CMDLINE_XEN=”sched=credit2Β  cpuinfo=1″

grub

But this is not an end I will keep updating about GRUB. πŸ™‚

Ubuntu 14.04 with Xen and Virtual Machine Manager

Installation of Xen Hypervisor and Virtual Manager on Ubuntu 14.04.1

1. Install Ubuntu 14.04.1 and more importantly enable virtualization in boot options
You can get the installation steps from Ubuntu official site.

2. Open terminal and install xen hypervisor
sudo apt-get install xen-hypervisor-amd64
(installing 64 bit hypervisor runs on 32 bit dom0 and also creates 64 bit domU)

Then reboot (you don’t have to update grub)
sudo reboot

3. After rebooting just to check if Xen booted with Linux
sudo xl info

sudo apt-get install bridge-utils

4. OpenΒ  /etc/network/interfaces and change it

auto lo
iface lo inet loopback

auto xenbr0
iface xenbr0 inet dhcp
Β Β Β  bridge_ports eth0

auto eth0
iface eth0 inet manual

Then restart network manager
sudo ifdown eth0 && sudo ifup xenbr0 && sudo ifup eth0

5. Now install Virtual Machine Manager
sudo apt-get install virt-manager

Now restart your system open virtual machine manager and add connection Xen.
Then start creating your domU’s.

Help for more OS at : https://help.ubuntu.com/community/Xen

FOSS Outreach Program :)

Hello Friends !!!! Finally I got selected in GNOME Outreach Program for Women πŸ™‚ I will be working on the project “Advanced Scheduling Parameters” in Xen. And here I am writing my blog to share my experiences. Before I jump to my experience lets talk about OPW in this post. So, in this post I will tell you about FOSS Outreach Program (Previously called OPW) and here it goes:

What’s FOSS Outreach Program for Women (OPW) ?

Reflective of a generally low number of women participating in the FOSS development. GNOME OPW provides an equal opportunity for women in FOSS. It provides Free and Open Source Software Outreach Program internships.

Then why Outreach Program now?

In this (9th) round, the Outreach Program for Women (OPW) is open to all participants of the Ascend Project regardless of gender as a pilot for expanding to people from more groups underrepresented in free and open source software.

What happens in GNOME Outreach Program for Women?

You will be contributing to Free and Open Source Software (FOSS) in different ways. That means new contributors (like me) are going to be a part of awesome open source projects. πŸ™‚

Is the program limited to coding ?

The internship offered are not limited to coding, but include user experience design, graphic design, documentation, web development, marketing, translation and other types of tasks needed to sustain a FOSS project.

How to start ?

1. Choose what you want to do.

2. Choose the project and the organization. For this read the project’s wiki page.

3. Contact the mentors of the project and lurk on project’s IRC channel. (Mentors are really very helping in nature so don’t hesitate in asking questions)

4. Once you decide the project then start contributing.

5. You can apply in more than one project or organization. But IMO quality is better than quantity therefore one should contribute in max 2 projects.

As for being able to apply in the program one should make at least one small contribution. So participation and selection process goes hand in hand.

Perks

1. Becoming a FOSS contributor and chance to meet and work with experienced contributors. πŸ™‚

2. $5,500 (USD) stipend, if project completed successfully. :-p

So, I will definitely ask you to harness this opportunity and share this among your friends and relatives.