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  • Changing File Permissions
  • Your Permissions
  • Group Permissions
  • Others’ Permissions
  • The chmod command
  • chmod Examples
  • Try chmod
  • chmod Shortcuts
  • Copying Permissions
  • Try chmod again
  • A Problem Solved
  • A New Problem
  • Setting User ID
  • Quick Reference Summary

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GeezerVison is showing catcode.com — Tutorial for chmod

chmod Tutorial

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

Back to Dave Eisenberg’s Home Page

This is a tutorial that teaches the UNIX ®/Linux ® chmod command. It presumes that you already know how to use the ls command to list the contents of a directory. The tutorial has been tested with Mozilla version 1.8 under Linux.

What is chmod?

chmod is a Unix command that lets you tell the system 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
  • The chmod 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 may download this tutorial as a gzipped tar file.

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Linux is a registered trademark of Linus Torvalds.

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