Join Kevin Skoglund for an in-depth discussion in this video sed: Stream editor, part of Unix for Mac OS X Users.
In this movie, we will take a look at a Unix program called sed.…sed is short for Stream Editor.…What that means is that sed modifies a stream of input according to a list of…commands before passing it on to the output.…It's very similar to the way that tr works, but with sed, we can modify the…stream of input in many more ways.…sed is a complex tool that offers several modes of working and mini features.…In this movie, we are just going to focus on the basics and get to see the most common usage.…It's most common usage is for doing substitution and so what we'll be doing is…sed, space, and then providing an expression for substituting.…
That will always begin with the letter s inside the quotes to indicate that it's…going to be doing substitution.…Then we have got some delimiters, the forward slash in my example, and then we've…got patterns of searching and replacing, just like we had with tr.…So we are going to search for whatever is in a and replace it with whatever is in b.…Notice that the big difference between this and tr though is that tr actually…
- 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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