Join Kevin Skoglund for an in-depth discussion in this video cut: Cutting select text portions, part of Unix for Mac OS X Users.
So far we've seen Unix tools that will let you find, translate, and replace.…The next useful Unix tool I want to introduce you to is cut.…Cut allows you to cut out selected portions of each line of a file.…We could probably write a sed command that would do something similar to what…cut does, but cut is much simpler and easier to use.…The first thing you need to know about cut is that it can cut three things,…characters, bytes, or fields, and we are always going to need to pick one of those.…We are only going to be looking at characters and fields, and the reason why is…that bytes in English is going to be exactly equivalent to characters,…because every character takes up exactly 1 byte.…
And really, bytes are there mostly for when you are thinking about raw data,…not actual characters, but raw data, and you want to grab a certain amount of bytes out of it.…We're working with text files here, so we're really thinking about characters,…and most times that's what you will be doing.…So characters and fields is where we're going to focus.…
- 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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