Introduction to Unix

1
Introduction to Unix

• Class Room 336
• Instructor Anthony Richards

2
Objectives

• Why are you here?

3
The Unix Operating System

• History, Advantages etc.

4
What is an Operating System

• Control program
• Manages computer resources
• Interface between user and computer (resources)
• Schedules tasks

5
Brief History of Unix

• Developed at ATT Bell Labs by Ken Thompson
• Designed as a multi-user system
• Improved significantly at University of
  California at Berkeley
• Used widely in academic and research institutions
• History Timeline

6
Why is Unix Popular?

• It is powerful enough to take advantage of the
  power and versatility of modern computers
• Proprietary systems no longer make good business
  sense
• Unix is portable across systems because it is
  machine independent

7
The Future of Unix

• Will Windows NT displace Unix in the market?

8
Some Features of Unix

• Multi-user os
• Many utilities
• Multitasking
• Job Control
• Networking capabilities

9
Components Of Unix

• The kernel (programs interact with system calls)
• The shell
• Utilities

10
Components Of All Operating Systems

• Memory Manager
• Processor Manager
• Device Manager
• File Manager
• User Command Interface (focus of this class)

11
Complaints about Unix

• Terse commands
• Unfriendly
• Unforgiving

12
Chapter 2Getting Started

• Login
• Identify shell Bourne or C?
• Change password
• logout

13
A few Basic Commands

• Date
• ls -a,-d,-g,-l,-r,-s,-t
• cal month year
• cat
• rm
• cp
• redirection gt and gtgt

14
Correcting Mistakes

• CTRL-H or BACKSPACE to delete a character
• CTRL-U or line kill key to erase a line
• CTRL-W to delete a word
• CTRL-R to redraw command line
• CTRL-D to abort execution

15
Getting Help

• Man pages
• Man command name