Operating Systems


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Operating Systems

  1. 1. Operating Systems Basic Concepts & System Software
  2. 2. Objectives: Know These <ul><li>Common functions of operating systems </li></ul><ul><li>Types of operating systems </li></ul><ul><li>Types and functions of utility programs </li></ul>
  3. 3. What is an OS? <ul><li>Operating System: set of programs containing instructions that work together to coordinate all the activities among computer hardware resources. </li></ul><ul><li>In Other Words: It’s what runs your computer. </li></ul><ul><li>Operating System is to Software </li></ul><ul><li>what Motherboard is to Hardware </li></ul>
  4. 4. OS Software Hardware User
  5. 6. Performance Devices Internet File Management Memory Programs Security User Interface Updates Network Start & Shut Down OS Functions
  6. 7. Starting & Shutting Down a Computer <ul><li>Shut down options: </li></ul><ul><ul><li>Power off </li></ul></ul><ul><ul><li>Sleep mode </li></ul></ul><ul><ul><li>Hibernating </li></ul></ul>
  7. 8. GUI vs. Command-line <ul><li>Visual vs. Textual </li></ul><ul><li>Mouse vs. Keyboard </li></ul>
  8. 9. Coordinating Tasks <ul><li>Task = (job) an operation the processor manages. </li></ul><ul><li>Examples: </li></ul><ul><ul><li>Receiving data </li></ul></ul><ul><ul><li>Processing instructions </li></ul></ul><ul><ul><li>Sending information to an output device </li></ul></ul><ul><ul><li>Transferring items from storage to memory </li></ul></ul><ul><li>Buffer = place in memory while waiting </li></ul><ul><li>Spooling (buffer for printing) </li></ul>
  9. 10. Spooling <ul><li>Queue = order of operations, a line </li></ul>
  10. 11. Configuring Devices <ul><li>Driver = small program that tells the OS how to communicate with a specific hardware device. </li></ul><ul><li>Boot loads drivers. </li></ul><ul><li>Plug & Play = OS automatically configures new devices as you install them. </li></ul>
  11. 12. Security <ul><li>Log on = access </li></ul><ul><li>User name or User ID = identity </li></ul><ul><li>Password = restricting access </li></ul>
  12. 13. Most Popular Operating Systems
  13. 14. Types of OS <ul><li>Windows 7, Vista, XP </li></ul><ul><li>Mac OS X </li></ul><ul><li>UNIX </li></ul><ul><li>Linux </li></ul><ul><li>Coming Soon: Google Chrome </li></ul><ul><li>Embedded Operating Systems </li></ul>
  14. 15. Utility Programs <ul><li>System software that allows a user to perform maintenance type tasks. </li></ul><ul><li>Some are included in OS </li></ul><ul><li>Others are added over time with software installs. </li></ul>
  15. 16. File Manager <ul><li>Tasks: </li></ul><ul><ul><li>Organize files </li></ul></ul><ul><ul><li>Copying </li></ul></ul><ul><ul><li>Renaming </li></ul></ul><ul><ul><li>Deleting </li></ul></ul><ul><ul><li>Moving </li></ul></ul><ul><ul><li>Sorting </li></ul></ul><ul><li>Folder = named location on hard drive </li></ul>
  16. 17. Search Utility <ul><li>Locates files on your computer </li></ul><ul><li>Searches by criteria </li></ul>
  17. 18. Uninstaller <ul><li>Removes installed programs </li></ul><ul><li>More complete than deleting file </li></ul>
  18. 19. Image Viewer <ul><li>Graphics files </li></ul><ul><ul><li>Displays </li></ul></ul><ul><ul><li>Copies </li></ul></ul><ul><ul><li>Prints </li></ul></ul><ul><li>See pictures without opening in an image editor </li></ul>
  19. 20. Disk Defragmenter <ul><li>Reorganizes files and unused space on hard drive </li></ul><ul><li>Makes computer run faster </li></ul>
  20. 21. Firewall <ul><li>Detects and protects computer from intrusions. </li></ul><ul><li>Monitors connection traffic </li></ul><ul><li>Internet connection makes you vulnerable to attacks from hackers. </li></ul><ul><li>Router = hardware firewall </li></ul>The internet is full of viruses. I better use protection!
  21. 22. Antivirus Programs <ul><li>Virus = harmful program </li></ul><ul><li>Antivirus = program that finds and removes viruses. </li></ul><ul><li>Worm = makes copies and uses up your resources shutting your computer down </li></ul><ul><li>Trojan Horse = hidden file </li></ul>What should I do? Don’t be this guy.
  22. 23. Media Player <ul><li>View images, animations, listen to music </li></ul><ul><li>Watch videos </li></ul><ul><li>Organize files </li></ul><ul><li>Convert from </li></ul><ul><li>different formats </li></ul><ul><li>Download files </li></ul><ul><li>Burn CDs </li></ul>