Roles of Operating SystemsUnit 2 computer systems

Topics

• Machine and peripheral management

• File management

• Features e.g. ability to customize, support for connectivity of portable media,

• Command Line and GUI Operating Systems

• Security

• Device drivers

• Associated utilities

• cost and support for the user

Operating System Installation

• Ubuntu –OS can be installed using CD/USB pen/ISO or try before using Live CD/USB.

• Live CD - loads the OS from CD, limited saving.

• Windows 7 – Install OS from CD/USB or Network

• Task – Find the recommended system requirements for Windows 7 professional and Ubuntu 12.04.1? (useful for the assignment )

• Task II- Boot Ubuntu Live OS from ISO/CD

Operating System –User interfaces

• Both the Ubuntu and Windows OS offer GUI and CLI interfaces, Linux offers KDE and Gnome GUI options.

GUICLI

Disk Management

• A hard disk must be prepared before it can be used.

• Partition (Allocate drive and space)

• Format (Prepare disk and adopt a filing system)

• Windows Disk mgmt

• Ubuntu Disk Utility

• Graphical display

• Ability to benchmark

disk performance

• Format disk

File System

• A file system is selected when the drive is formatted. Different File Systems provide different capabilities.

• Examples include FAT / NTFS (Windows)

⚫ EXT 4, EXT3, NTFS, FAT, (Linux)

• ☺ Ability to read and write from other File Systems such as NTFS and FAT.

⚫ Task: Read through the File Systems hand-out and identify the key differences. This document can be found on the Stud Share BTEC\Level3\Unit2\2010\file Systems.

User account Defaults

• Ubuntu provides less permissions to a user from the outset, Windows gives full permissions from the outset.

• UAC( User Account Control) has helped identify Administrative tasks (Windows).

Accounts will full system access

• Windows - Administrator

• Ubuntu - Root (Super User)

Work Space

• Windows 7 – My Documents

• Ubuntu – Home Folder

Groups (users belong to a group)

• Root, Users, many others

• Administrators, Power users, Users, etc

File System and permissions

• Permissions

• Windows – FAT/NTFS Permissions

• (see user accounts and permission exercise)

• Ubuntu – Folder (List, Access , Create and delete)

• File ( Read only , Read and write)

• Ubuntu gives less permissions to a user from the outset Windows gives full permissions from the outset.

Security

• User/Group accounts

• Permissions (control access to files and folders).

• Firewall – To control traffic coming in and out of the computer.

• enabled by default In Windows 7 and not in Ubuntu. (To enable the firewall within Ubuntu, click here > Enable FW

• Antivirus – Linux has very few viruses, Windows will require AV software due to the many viruses that exist.

• Encryption – (requires the use of keys to encrypt/decrypt files) Windows 7 offers compression and encryption and Ultimate edition offer Bit locker See Video, Ubuntu Provides the same features

Device Drivers

• Identified through Device Manager• Correctly installed

• Device requires a driver

• Plug and play – New hardware is this recognised by the OS automatically and will attempt to install a driver.• If not the OS will prompt the user for a driver or request to look online.

• Ubuntu – find compatible drivers• ☺ Through a repository (Safe source)

• Less driver support overall (may require use of terminal to install the device driver)

• Lspci, lsusb or use Ndiswrapper (emulate win drivers)

Updates

• Windows Automatic update

• Ubuntu – repository system\administration\manage updates (these can be automatic)

• Ubuntu software centre (select and install software from a safe source)

Associated utilities

• Open Office

• Mozilla Firefox/Thunderbird

• Internet Explorer

• Media Centre

• Games

OS Support

• Ubuntu

• Free Community support

• Forums

• Automatic updates

• support can be purchased

• http://www.ubuntu.com/support

Microsoft

• Online

• TechNet

• Automatic updates

• Help and support (online)

• Support can be purchased