Unix Structure

1
Unix Structure Commands

• The Structure
• Commands
• -Format
• -Editing
• -Basic Commands

2
The Structure of Unix

• Unix is a layered operating system

3
Format of Commands

• Command arg1 arg2 argn ltENTERgt
• Eg,
• ls
• cat filename
• echo SHELL
• man who
• Note
• Commands are usually in lower case.

4
Arguments

• An argument can be
• File names
• String
• Text
• An option

5
Editing

• Backspace
• ltCtrlgt-backspace
• ltCtrlgt-h
• ltCtrlgt-w
• ltCtrlgt-u
• To interrupt or Abort
• Delete
• ltCtrlgt-c

6
Basic Commands

• cat more less pg
• cp ls (ls, ls a, ls l, ls R, ls F)
• mkdir rm (rmdir, rm r)
• who w
• finger
• lpr lp
• date cal month year, cal 9 2001
• head tail

7
Next Week

• File Structure
• Access Permissions
• More Commands
• And Utilities
• Reading Chapter 4