UNIT 7 System Administration Review

Terabyte

1 trillion bytes equivalent to 250,000 digital photos

GUI

A Graphical User Interface, currently the dominant method for designing human-computer interaction.

Cache

A collection of stored data and files from your computer

Proxy Server

A computer system (or an application program) that intercepts internal user requests and then processes that request on behalf of the user.

Private browsing

A feature of all modern browsers that will delete your history, cache, and cookies the moment you close the private window, but save your downloads and bookmarks

Client-side scripting

A program downloaded as part of a web page executed by the browser on the user's computerfor faster, more responsive webpages; can be a security risk

Software

A set of computer instructions that tell the computer how to work

Embedded OS

A specialized, and often limited operating system design to fit inside a certain type of machine. For example computers in cards, traffic lights, cash machines, POS, elevators, drinks machines etc.

Command Line Interface

A user types commands represented by short keywords or abbreviations or presses special keys on the keyboard to enter data and instructions

What does an Operation System do?

Allows the user to communicate with the computer.

Platform

An operating system such as Mac, Linux, or Windows

proprietary software

Comes from a company or individual for a licensing fee and may include customer support.

Role of File System

Compression, Encryption, Permissions, Journaling

Compression

Decreasing file size to save room on hard drive

Workstation OS

Most commonly used on a desktop or laptop and can perform many tasks without internet connection

authorization verses authentication

One specifies the access rights for users while the other is used to prove the identity of a user such as asking for passwords or security codes

Server OS

Operating system software that runs on a network server to provide resources to network users.

Mobile OS

Operating systemn used on devices such as an iPhone, tablet, or Android phone

Types of Software

Productivity, Business, Collaboration

Antivirus software

Scans and searches hard drives to prevent, detect, and remove known viruses, adware, and spyware

Local network hosted

Software distributed over a LAN such as npsri.net; two tier

Hypervisor

Software that enables a single computer to run multiple operating systems simultaneously.

Cloud hosted

Software that is installed, hosted and accessed entirely from a remote location or server; three tier

Firmware

Software that is permanently stored in a chip. The BIOS on a motherboard is an example

Locally installed software

Software which is installed on the user's computer; one-tier

cross-platform compatibility

The ability to share files or functionality across different operating systems.

File systems

The overall structure of an operating system, in which files are named, organized, and stored. FAT and NTFS are examples

Examples of OS

Windows 10, Mac OS, iOS, Android, Linux

single-platform

Works on only one platform such as only on iPhone or only on Android

open source software

noncommercial software shared freely and developed collectively on the internet

Permissions

restricting or granting of access to specific files and folders on a computer network to a user or group of users.