Skip to main content


Booting process of LINUX ( step by step )

There are lot of forum links , articles which explains the booting process of Linux.  I am not going to tell any thing different but I would like to show my point of perspective on some extra details of the  Linux Booting procedure. Here we go ! The stages involved in Linux Booting Process are: BIOS Boot Loader     - GRUB Init Runlevel scripts BIOS This is the first thing which loads once you power on your machine. When you press the power button of the machine, CPU looks out into ROM for further instruction. The ROM contains JUMP function in the form of instrucion which tells the CPU to bring up the BIOS BIOS determines all the list of bootable devices available in the system. Prompts to select bootable device which can be Hard Disk, CD/DVD-ROM, Floppy Drive, USB Flash Memory Stick etc (optional) Operating System tries to boot from Hard Disk where the MBR contains primary boot loader. Boot Loader  It is the first sector of the Hard Disk with a siz

Interview Questions on VMware vSphere - PART 1

1. What is a Hypervisor? It is a program that allows multiple operating systems to share a single hardware host. Each operating system appears to have the host's processor, memory, and other resources all to itself. However, the hypervisor is actually controlling the host processor and resources, allocating what is needed to each operating system in turn and making sure that the guest operating systems (called virtual machines) cannot disrupt each other. 2. What is the hardware version used in VMware ESXi 5.5? Version 10 Below is the table showing the different version of hardware used in different VMware products along with their release version Virtual Hardware Version Products 10 ESXi 5.5, Fusion 6.x, Workstation 10.x, Player 6.x 9 ESXi 5.1, Fusion 5.x, Workstation 9.x, Player 5.x 8 ESXi 5.0, Fusion 4.x, Workstation 8.x, Player 4.x 7 ESXi/ESX 4.x, Fusion 2.x/3.x Workstation 6.5.x/7.x,Player 3.x 6 Workstation 6.0.x 4 ACE 2.x, ESX 3

VMware: Deploy VMs from Template using PowerCLI

Syntax : 1..<N> | Foreach {  New-VM -vmhost <ESX_HOST> -Name <VM_NAME> -Template <TEMPLATE> -Datastore <DATASTORE> [-OtherOptions]  }  Where: <N> is the number of VMs you need to deploy. <ESX_HOST> is the host where you will deploy your VMs <TEMPLATE> is the template from which your VMs will be created <DATASTORE> is the datastore that will contain your VMs [-OtherOptions] are additional options that can be used in conjunction with New-VM command. As you can see it's really basic, but New-VM cmdlet is really powerful and it has a lot of options. To go through all on New-VM options: Get-Help New-VM -Detailed Here's how I used it today for deploying 6 VMs that will be Oracle RAC nodes. Open a text editor and paste this code in it saving file with .ps1 extension. 1..2 | Foreach {  New-VM -vmhost -Name RAC$_ -Template OL6 -Datastore datastore1  }  3..4 | Foreach {  New-VM -vmhost esx

Scavenge.exe tool to delete cached content from secondary cache drive

Prerequisites This article assumes that you are familiar with the overall functionality of ARR and know how to deploy and configure ARR with disk cache. If you have not done so already, it is strongly recommended that you review the following walkthrough before proceeding: Configure and enable disk cache in Application Request Routing If Application Request Routing Version 2 has not been installed, you can download it at: Microsoft Application Request Routing Version 2 for IIS 7 (x86)  here . Microsoft Application Request Routing Version 2 for IIS 7 (x64)  here . Follow the steps outlined in  this  document to install ARR Version 2. This walkthrough also assumes that secondary cache drive has been added to ARR for caching. If not, please follow the Configure and Enable Disk Cache in Application Request Routing walkthrough. Scavenge.exe tool in ARR Scavenge.exe is a command line tool that can be used for managing the secondary drive by the administrators. The exe is