Join Kevin Skoglund for an in-depth discussion in this video Suppressing output, part of Unix for Mac OS X Users.
Now that we've talked about the basics of redirecting input and output,…there is one last redirection technique that you should know about.…Instead of redirecting output to a file or into a command, what if we want to…have no output at all?…This is especially useful when you become advanced enough that you're able to…setup scripts on a server that run automatically at 4 a.m. even when there's not…anyone logged in to view the output.…At that point you don't need the output, right. You just want it to just do this…thing and the output should just go away, and there may also be occasions where…you want to run a program or you just don't want to see the output. You just…want the program to do its thing and get its results.…
Well we could just put the output to a file and then throw away the file, but…there is an even easier way to do it. We can redirect the output to a special file…that referred to as the null device.…It's also sometimes called the bit bucket or the black hole, and it lives at /dev/null.…
- 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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