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chmod Tutorial

This tutorial is licensed under aCreative Commons Attribution-NonCommercial-ShareAlike 2.5 License.

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This is a tutorial that teaches the UNIX ®/Linux ®chmod command. It presumes that you already knowhow to use thels command to list the contentsof a directory.The tutorial has been tested with Mozilla version 1.8under Linux.

What ischmod?

chmod is a Unix command that lets you tell thesystem how much (or little) access it should permit to a file.

Here are all the topics:

• Changing File Permissions
• Your Permissions
• Group Permissions
• Others’ Permissions
• Thechmod command
• chmod Examples
• Try chmod
• chmod Shortcuts
• Copying Permissions
• Try chmod again
• A Problem Solved
• A New Problem
• Setting User ID
• Quick Reference Summary
• chmod by the Numbers
• Numeric Mode in Action

You maydownload this tutorial asa gzipped tar file.

UNIX is a registered trademark of The Open Group.
Linux is a registered trademark of Linus Torvalds.