Join Kevin Skoglund for an in-depth discussion in this video Disk information commands, part of Unix for Mac OS X Users.
In this movie we're going to be looking at some commands to give us some hard…drive information, or as Unix typically refers to it a disk.…The two commands we're going to be looking at are df and du.…df stands for disk free space, so it's going to display the amount of disk free…space available to us.…If I type a line by itself and hit Return, it'll come up with the report…telling you all of the volumes that it can see, the hard drives, and how much…space is being used and how much is available on each of them.…Notice that it has a couple of devices here that it's calling volumes that are…just sort of utility devices that it's using.…
You can basically ignore those.…The one we care about are the ones with the big numbers.…Main hard drive is listed here as root.…That's where it's mounted.…If we had other hard drives, maybe you have your hard drive partitioned or you…have external drives plugged in, you would see those under /volumes/ and then…the name of the hard drive.…We would see reports for those as well.…
- 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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