1. Chapter 11 – Processes and Services
CMIT100
Chapter 11 – Processes and Services

2. Learning Objectives
Describe the steps in starting, controlling/managing, and terminating processes in Windows 7 and Red Hat Linux.
Introduce process scheduling through the Windows Task Scheduler and the Linux commands at and crontab.
Discuss the role of the service in support of operating systems.
Describe the process of configuring Linux services.
Discuss how to control service startup in both Windows 7 and Linux.

3. What is a Process?
Executable Program started manually or by another process
Parent Process: A process that starts another process
Child Process: A process started by another process
Also known as a ‘Process Tree’
Orphan: A child process that continues to exist after its parent has stopped
Zombie: A defunct process

4. Processes Foreground: Processes that are interacting with the user
Background: Processes that are running without user intervention
Process Status: Information about a process’ state, resources, and Process ID (PID)

5. Managing Processes
Windows
Task Manager

6. Managing Processes Linux The ps command The kill command
The nice command

7. Managing Processes
Linux
The top command

8. LAB
Managing Windows Processes
Managing Linux Processes

9. Scheduling Processes
Windows
Task Scheduler

10. Scheduling Processes Linux The at command The cron service
Used to run a scheduled process once
The cron service
Use to run a scheduled process repeatedly
Configured by editing the crontab file

11. LAB
Windows Task Scheduler

12. Services Software that provides a particular function
May be running, suspended, or stopped
Run in the background
Commonly started at boot time
In Linux, referred to as daemons
Examples:
service
DNS Client service
DHCP Client service

13. Managing Services
Windows
Services Console

14. Managing Services Windows Four startup options Dependencies Automatic
Automatic (Delayed Start)
Manual
Disabled
Dependencies
Services that are needed for other services to start

15. LAB
Configure Windows Services

16. System Logging Why are system logs useful?
Both Windows and Linux provide logging capability

17. System Logging Windows Event Viewer Three levels EventID Info Warning
Error
EventID

18. LAB
Using the Windows Event Viewer

19. Creative Commons Statement