How to Create a Folder in Ubuntu Command Line

When you are new to the Linux command line, even the most basic things may look complicated.

Take the example of creating folders in the Ubuntu command line. You may find it a daunting task if you don't know or remember the correct command.

But fret not. You can create a new folder in the Ubuntu terminal as easily as running this command:

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mkdir new_dir

The above command will create a new empty folder named new_dir.

Let's take a deeper look into creating new directories in Ubuntu via the terminal.

Create a new directory

Unlike creating new files, there is only one command for creating new directories.

To create a new empty directory in the current location, you can use the command:

mkdir new_dir

Create multiple folders

If you want to create more than one folder in Ubuntu, you can do that in a single command like this:

mkdir dir1 dir2 dir3

Here's a sample output:

abhi@learnubuntu:~/new_dir$ mkdir dir1 dir2 dir3
abhi@learnubuntu:~/new_dir$ ls
dir1  dir2  dir3

I know you are not prepared for it at this moment but you can use the curly braces expansion to make multiple folders with similar names.

abhi@learnubuntu:~/new_dir$ mkdir dir_{1..9}
abhi@learnubuntu:~/new_dir$ ls
dir_1  dir_2  dir_3  dir_4  dir_5  dir_6  dir_7  dir_8  dir_9

It's okay if you are not familiar with this concept. You can learn more about it later.

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Create a folder in another location

The above two examples create new directories in the same location as your current one.

If you want to create the folder in some other folder location, you'll have to provide the absolute or relative path to the location. Here's a quick recall.

Here's an example. I have a new_dir folder in my current location. I'll create a new folder under this new_dir folder from the same position.

abhi@learnubuntu:~$ ls
file2.txt  my_dir  new_dir
abhi@learnubuntu:~$ ls new_dir/
abhi@learnubuntu:~$ mkdir new_dir/another_new_dir
abhi@learnubuntu:~$ ls new_dir/
another_new_dir

Created directory only when it doesn't exist already

This is a common problem when you are writing scripts.

If you try to create a folder that already exists, you'll get an error "mkdir: cannot create directory ‘new_dir’: File exists".

abhi@learnubuntu:~$ ls
file2.txt  my_dir  new_dir
abhi@learnubuntu:~$ mkdir new_dir
mkdir: cannot create directory ‘new_dir’: File exists

Imagine you are writing a script that will be used on other systems and by other users. And in the script, you have to create a certain folder. If a folder by that name already exists, your script will fail because of the error it shows.

This is where the -p option of mkdir comes into play. With this, you won't see any errors if there already exists a directory of the same name. This way, your script won't fail because the mkdir command doesn't return any errors.

abhi@learnubuntu:~$ ls
file2.txt  my_dir  new_dir
abhi@learnubuntu:~$ mkdir -p new_dir
abhi@learnubuntu:~$ ls
file2.txt  my_dir  new_dir

Create nested directories

Imagine that you have to create a certain directory structure that has a directory inside it.

The -p option of the mkdir command can be used here as well. It creates the parent directory if it doesn't exist already.

mkdir -p dir1/dir2/dir3

Let me share an example.

abhi@learnubuntu:~$ ls
dir1  file2.txt  my_dir
abhi@learnubuntu:~$ mkdir -p dir1/dir2/dir3
abhi@learnubuntu:~$ ls dir1/
dir2
abhi@learnubuntu:~$ ls dir1/dir2
dir3

Bonus Tip: Create directories with specific permissions

This is a bit advanced topic for you at this stage. I hope you are familiar with the concept of file permissions in Linux.

You can force mkdir to create folders with specific permissions:

mkdir -m 755 new_dir

Conclusion

That's all you need to know about making a folder in the Ubuntu command line. You probably want to learn about deleting folders as well. These are some of the basic stuff you need to know when you are just starting with the command line.

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Enjoy learning Ubuntu.