One command to create a directory and file inside it linux command

Question

Imagine my current directory is A. I want to create the directory B and the file named "myfile.txt" inside the directory B.

How to do this in one command using a Terminal?

Edit:

The directory can be nested multiple times. I would like to create B/C/D and then a file named "myfile.txt" inside that. I don't want to repeat my directory part.

The following command will create a directory at any level.

mkdir -p B/C/D 

and

mkdir -p B/C/D && touch B/C/D/myfile.txt

This is to create a directory and a file. But I do not want to repeat this directory part after each touch command. Is this possible?

Answer 1

Use the below command:

mkdir B && touch B/myfile.txt

Alternatively, create the function:

mkfile() { mkdir -p -- "$1" && touch -- "$1"/"$2" }

Execute it with two arguments: path to create and  the filename. Saying:

mkfile B/C/D myfile.txt

would create a file myfile.txt in a directory B/C/D.

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