Join Kevin Skoglund for an in-depth discussion in this video Setting and exporting environment variables, part of Unix for Mac OS X Users.
In this movie we're going to learn more about environment variables which are…also known as shell variables.…We're going to do that so that we can begin to use environment variables to…configure our working environment.…We've touched on shell variables already.…For example, we saw that we can have echo $SHELL and that will return the…default login shell for the current user.…The shell variable in this case is called SHELL and it's in all capitals.…The dollar sign is actually not part of the shell variable name.…The dollar sign is there to serve as an indication to Unix that we want it to…return the value that's stored in the shell variable.…
We can also define our own shell variables as well.…For example, I can have MYNAME= and then inside quotes put your name.…Then I could echo that back the same way.…echo $MYNAME, and it returns the value that we've set inside that variable.…Notice that I did not use the dollar sign when I set the value of MYNAME. I only…use it when I wanted to retrieve the value.…
- 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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