Join Kevin Skoglund for an in-depth discussion in this video Monitoring processes, part of Unix for Mac OS X Users.
In the last movie we saw how we can use the ps command to be able to view a list…of the Unix processes that are running.…But the problem with it is that sometimes we don't just want a snapshot in a…moment in time. We actually want to be able to watch the processes.…We want to be able to monitor them as the CPU and memory usage goes up and down,…whereas processes start and stop.…So to do that we need something that's a little more interactive that will keep…refreshing and showing us the state of things as they change.…The tool for doing that is called top.…So if you simply type top and hit Return, you will get a list of the top processes.…
Now, top processes depends on what order you've sorted it in.…By default, it's sorted by the Process ID.…So the most recent processes are at the top.…You will see above that that we actually have a list of some summary…information, the CPU usage, the memory usage, that kind of thing that's going on, …and then we get that information for each one of these 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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