Join Kevin Skoglund for an in-depth discussion in this video diff: Alternative formats, part of Unix for Mac OS X Users.
In this movie we're going to learn to control the format the DIFF uses for output.…We can have an output that's something called copied context, which it would be c…option. We can use the u option for unified context, and then we can have y for…side-by-side comparison.…There's a q option that will tell us only whether the two files are different.…It won't report what that actual changes were to us.…It'll just give us a single line saying yes, the two files are different.…There are also a couple of other output formats but I think these are going to…be the most common and the most useful for you.…Let's take a look at them.…So let me just clear my screen and let's do that same thing but now let's pass…in that -c for copied context.…
Now notice what it does is it gives us the whole first section, lines 1 through 11.…It lets you know that here at the beginning. And here it is.…That's everything that was in the first document.…And then below that is everything that was in the second document.…And it gives us a minus here letting us know that something got deleted and it…
- 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
Q: The exercise files for the following movies appear to be broken:
Is there something wrong with them?
These exercises include one or more "dot files", whose file names start with a period. These files are normally hidden from view by the Finder. So that they would show up in the Finder, the period has been removed from the file names. Additionally, "_example" has been added at the end of the file name to make it clear that the file will not work as-is.
To make the dot files usable, either:
1) Open the file in a text editor to view its contents. Note that it may not be possible to double-click the file to open it because there is no file extension (such as .txt).
2) Resave the file under a new name (usually by choosing File > Save As), adding a "." to the beginning of the file name and removing "_example" from the end.
1) Copy and rename the file from the Unix command line using the techniques discussed in this course. Rename the file by adding a "." to the start and removing "_example" from the end. Include the "-i" option to prevent overwriting an existing file unexpectedly.
Example: cp -i ~/Desktop/Exercise\ Files/Chapter_07/07_02_files/bashrc_example ~/.bashrc
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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