1. Chapter 8: Network Operating Systems
21 Oct 2015 (BttF Day)

2. Notice No class next week
Mon Oct 26 and Wed Oct 28
Please read Ch 8 (if you haven't already) and begin chapter 9.

3. Chap 8: Operating Systems
OS provides interface for users to run applications and access data
Shell
Kernel

4. Source: Wikipedia.com

5. Chap 8: File System
A File System is how an OS stores and organizes files
Convenient interface
Efficient organization (usually)
Hierarchical filing
Indexing for fast retrieval
Secure access

6. Chap 8: Hierarchy

7. Chap 8: File Systems Ext2, Ext3, Ext4 – Usually for Linux
NTFS – Windows
FAT12, FAT16, FAT32 – Older but compatible
HFS – MAC OS
ZFS – New technology
NFS – Network File System

8. Chap 8: Processes and Services
Process (or task) is a program that is loaded into memory and run by the CPU.
Application
Service
Daemon
Running multiple tasks at once is called “Multitasking”
Preemptive – OS gives slices of time to each process
Cooperative – Processes maintain control until they relinquish it

10. Chap 8: Network OS
Used to be a difference between standard OS and a Network OS
Modern OS are almost always Network OS
Can be clients or servers
Nowadays, roles are not always perfectly distinct
Most OS have the following network client software:
DHCP
DNS
HTTP
(really?)

11. Chap 8: DHCP Client

12. Chap 8: DNS Client
Source: Routercheck.com

13. Chap 8: HTTP Client

14. Chap 8: Client
Outlook or Thunderbird

15. Chap 8: Client
Most people get their through an HTTP client

16. Chap 8: Server OS Centralized user account management
Usually through “Active Directory”
Centralized storage
Can use Network-Attached Storage (NAS)
Can use Cloud-based storage
Provide DHCP, DNS, HTTP, services

17. Chap 8: Windows Server 2008

18. Chap 8: Virtualization

19. Chap 8: Reasons for Virtualization
Easy OS training/easy clean up
Software training
Isolation for applications/networks
Efficient use of hardware/space

20. Chap 8: Virtualization Products
VMware Workstation/Player/Fusion
Oracle Virtualbox (free!)
HyperV (Microsoft)

21. Short break

22. Chap 8 Group project Page 393, Case Project 1 and Case Project 2
Bonus question: Research ESXi and explain how it is different from Vmware Workstation.
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