Join Kevin Skoglund for an in-depth discussion in this video Regular expressions: Basic syntax, part of Unix for Mac OS X Users.
Now I'm not going to go through all of these item by item, but you can pause the…movie if you want to take a look.…Really get a feel for what they do.…First a simple period, that's a wild card. The character set, so that's any…character listed inside those square brackets.…So in the example on the far right you can see that that would match both grey…and gray, both spellings of gray could get matched.…Then we have a negative character set. We'd have the same square brackets but we…put a caret as the first character inside of them and that would say any…character that's not included there.…So for example, if we wanted to match everything that was not an A, E, I, O or U,…then we would use that negative character set.…
Next we have the range indicator which is a minus sign and that's typically just…used inside a character set to indicate a range of characters.…You don't have to actually spell out every single character you mean. You can…just say capital A to capital Z, A dash Z, lowercase a to z, 0 to 9, and those…
- 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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