Mac terminal go back to home directory
Why is this important? Once you get into any kind of programming design, front-end, back-end, and more , you'll almost always create folders and files for your code via the command line.
The "Desktop" or "Documents" folder could be a good place to be. Change directories into the Desktop directory if you don't have a Desktop folder, it's fine. In our example, the folder should be called "Second semester. Clearly, we need a different way to indicate "Second semester" is all one file name; not two separate ones.
The Command Line
To create or reference a folder with multiple words in it , you have three options:. In programming, you'll often use backslashes to escape special characters! Or escape meaning ignore the special meaning of the space by prefacing it with a backslash, a confusing but common programming habit:.
Now it's your turn! Create folders for the school subjects listed above:. Creating folders is exactly the same process whether or not there will be code inside of them.
Method 1: Show Macintosh HD in Finder and Desktop
A folder is just a folder! That's totally fine. I just want to show you the classic structure of these kinds of projects so you can see that folder creation via Terminal isn't just useful for school purposes: it's also the kind of thing programmers do every day. Many programmers use a very classic folder and file structure when building basic webpages.
The system call that effects the command in most operating systems is chdir that is defined by POSIX. This means that when the command is executed, no new process is created to migrate to the other directory as is the case with other commands such as ls.
Instead, the shell itself executes this command. This is because, when a new process is created, child process inherits the directory in which the parent process was created. If the cd command inherits the parent process' directory, then the objective of the command cd will never be achieved. Windows PowerShell , Microsoft's object-oriented command line shell and scripting language , executes the cd command cmdlet within the shell's process.
Master the command line: Navigating files and folders
However, since PowerShell is based on the. NET Framework and has a different architecture than previous shells, all of PowerShell's cmdlets like ls , rm etc. Of course, this is not true for legacy commands which still run in a separate process. A directory is a logical section of a file system used to hold files.
Directories may also contain other directories. The cd command can be used to change into a subdirectory, move back into the parent directory, move all the way back to the root directory or move to any given directory. A similar session in DOS though the concept of a "home directory" may not apply, depending on the specific version [ vague ] would look like this:. DOS maintains separate working directories for each lettered drive , and also has the concept of a current working drive.
If we were to right-click directly onto our Desktop view, that little menu would pop up, we could click on "New Folder", and then a brand new folder would pop up for us to name. This command does that same functionality. Wherever this command is ran from, it will create the new folder in that spot. The folder must be empty for this to work.
Top 10 Bash file system commands you can’t live without - By Ryan Davidson
If we followed the commands above:. By running the following command, that would create a file:.
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Want to know all the commands that have been ran in the current terminal session? Run the command, history to see them. Another trick!
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Use the "up" and "down" arrows to navigate through previous commands. Want to limit the number of commands it shows? This command allows us to see the contents of a particular file.