Computing Concepts

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Computing Concepts

• File Organisation and MS-DOS
• II

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What we have done so far

• Files organised into directories
• Directories form a hierarchy
• Operating systems
• Running programs
• Managing files
• Managing memory
• Controlling peripherals
• Utility programs

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What we are going to do today

• Examine the MS-DOS operating system

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MS-DOS uses a Command Line

• Do not use mouse
• Type in commands as words
• Use a command line box
• Start Programs Accessories Command Prompt
• Demo

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Entering MS-DOS commands

• Commands consist of
• A single word
• Optional extra information
• E.g.
• c\gtver
• c\gtping www.playboy.com
• c\gtping www.bbc.co.uk

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The current directory

• When using MS-DOS, it always places you in a
  directory
• Everybody has got to be somewhere (Eccles the
  Goon Show circa 1954)
• This is called the Current Directory
• The command prompt tells you what the current
  directory is
• E.g. c\windows\tempgt
• Current directory is \windows\temp on the c drive

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Finding out what is in the current directory

• Use the dir command
• E.g. c\gtdir

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This file is named win2k.xpr It is 189,624 bytes
in size
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Total size of files in this directory Number of
bytes still available on the disc
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Changing drive in MS-DOS

• Demo
• Use drive name (A, C etc)

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File handling in MS-DOS
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Using edit

• Demo
• Creating text files
• Editing text files

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Using copy

• Demo
• Using wildcards in copying
• c\gtcopy .txt c\temp
• c\gtcopy . c\temp

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Batch files

• Batch files
• Collecting batches of commands into one command
• Like a macro in other applications e.g. Word,
  Excel

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A batch file example

• What directory structure does this batch file
  create

cd \ md A md B cd A md C
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A second batch file example

• Write a batch file to create this directory
  structure

cd \ md A md B md C cd B md D
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A third batch file example

• Write a batch file to create this directory
  structure

cd \ md D md A cd D md B cd \A md D