Operating System

MSSQL Add full text search (Linux)

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If you need to add a full text search index on you column, then you need to add an extra package. You can install it by using the following command: If the package is not found, then you need to go to Windows Docs to install the required repository. After that you just to need … Read more

Install any perl module on CentOS

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First make user CPAN is installed. To check run ‘cpan’ command. If it is installed then you be in the cpan CLI. To quit the CLI write ‘q’ and press enter. If not installed please go here To install any module, use following command: In above command ‘SHA’ is the module that is installed.

Install CPAN on CentOS

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CPAN allows to install perl modules. Use following command to install CPAN: Then configure it using following command: Most of the configuration could be done automatically. So choose that option. To quit the cpan CLI write ‘q’ and press enter.

General Overview Of UNIX System

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First UNIX system was developed in 1969 and ran on systems from microprocessors to mainframes and provided a common execution environment across them. The system was divided into two parts : Programs and services: It is the part readily apparent to users e.g. shell, mail text editor etc. Operating System: That supports above-mentioned programs and service. … Read more

Kernel Architecture of Various Popular Operating Systems.

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Overview : UNIX : Layered Architecture Linux : Monolithic Architecture Windows : Hybrid Architecture (Microkernel + Layered) Mach : Microkernel Architecture. UNIX KERNEL ARCHITECTURE : Unix OS considers files and processes as the most important entities.   Unix offers a shell that acts as a command interpreter between the user and the kernel. The relevant … Read more

Virtual Machine Architecture

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Virtualization can be defined as the process of creating multiple copies of an object. A virtual machine is a virtualization of a machine. The software that creates multiple copies of a machine is called a virtual machine monitor (VMM) or a hypervisor. Each virtual machine have its own OS called ‘guest OS’ and the OS … Read more

Types of Operating System Architecture Models

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There are mainly three types of operating system architecture models : Monolithic OS : Used in older but smaller operating systems. Operating system is divided into procedures. Each procedure have a particular task and all procedures have common data structures and system tables. Each procedure can call other procedures. Resulting in high degree of inter-process … Read more

Processor Execution Modes

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There are mainly three types of OS architecture models : Monolithic OS Layered OS Client-server or microkernel OS In every model, there are two modes of processor execution : the user mode and the system mode. Application programs run in the user mode whereas the operating system runs in the system mode. The system mode … Read more