Join Kevin Skoglund for an in-depth discussion in this video Using the command history, part of Unix for Mac OS X Users.
In this movie, we are going to learn how to utilize the Unix command history.…Early on in this training, we learned how to use the up arrow to go back and…review commands that we had issued previously.…We can then either reissue those commands or make edits to them.…But what you may not have thought about is how does Unix remember those commands?…Because even if we close the Terminal window, even if we shut down our Mac and…reboot it, Unix still remembers what our previous commands are.…So it must be keeping track of them somewhere, and it is.…It does it inside a file and that file is inside our user directory, ls -la.…
You can see it here.…It's a dot file, bash_history.…And this is where the bash shell stores its history of commands.…We will take a look at the contents of that file.…You will see that it lists our previous commands.…It's just one line per command.…Now yours is probably a lot longer than mine.…I actually went in and edited mine to make it a lot shorter.…I want you to notice something.…
- 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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