Join Kevin Skoglund for an in-depth discussion in this video Setting permissions using alpha notation, part of Unix for Mac OS X Users.
Now that we understand how permissions work, how do we go about changing them?…Well, you remember with ownership, we used chown, change ownership.…We are going to use chmod to change permissions.…It stands for change mode and that's what Unix refers to the mode of these files…is being what it calls to permissions.…So chmod and then we are going to put in whatever the mode is.…I am just going to write the word mode as placeholder, we will talk about what…the mode is, followed by the file name and so we will just put file name. That's the format.…chmod, whatever changes to the mode we want, and then the file name.…
So let's look at some example of what that mode might look like.…So first, remember that we have three categories.…We have user, group, and other.…Notice the first letters of those.…u, g, and o. We are going to be using those first letters to indicate where we…want to make changes to, which category should get changes.…Okay, so u, g, and o, r, w, and, x.…So the first one I want to look at is going to be changing user, group, and…
- Moving around the file system
- Creating and reading files
- Copying, moving, renaming, and deleting files and directories
- Creating hard links and symbolic links
- Understanding user identity, file ownership, and sudo
- Setting file permissions with alpha and octal notation
- Changing the PATH variable
- Using the command history
- Directing input and output
- Configuring the Unix working environment
- Searching and replacing using grep and regular expressions
- Manipulating text with tr, sed, and cut
- Integrating with the Finder, Spotlight, and AppleScript
Skill Level Beginner
1. Introduction to Unix
2. Filesystem Basics
3. Working with Files and Directories
4. Ownership and Permissions
5. Commands and Programs
6. Directing Input and Output
7. Configuring Your Working Environment
8. Unix Power Tools
9. Useful Mac-Only Commands and Techniques
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