ENVS 1500 Chapter 13: ENVS 1500 Chapter 13 Notes
13 May 2018
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ENVS 1500 Chapter 13 Notes – Summary
Introduction
File Commands
• The second, and most familiar, category of user services are commands for the storage,
retrieval, organization, and manipulation of files.
• Fro the perspetie of the user, the file aageet syste is hat akes it all
possile.
• Four factors account for the importance of the file management system to the user
• The ability to treat data and programs by logical file name, without regard to the
physical characteristics of the file or its physical storage location
• The ability of the file management system to handle the physical manipulation of the
files and to translate between logical and physical representations
• The ability to issue commands to the operating system that store, manipulate, and
retrieve files and parts of files
• The ability to construct an effective file organization utilizing directories or file folders to
organize ones files in a meaningful way
• The file management system is so important that we have devoted the entirety to it.
• Of interest to us here, as users, is the fact that most of the user commands in the
operating system are directly used to manipulate files and file data.
• This is evident if you consider the commands that you use in your regular work with the
computer.
• The brief partial list of Windows and UNIX/Linux CLI commands typifies the commands
that you would probably consider to be most important to you.
• Other operating systems provide essentially identical commands
• Although the commands might appear quite different, depending on the user interface
• Graphical user interfaces provide equivalent operations for each of these commands.
• On a Macintosh computer, for example, you move a file by dragging its icon with the
mouse from its current location to the desired location.
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