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

Question

Suppose my current directory is A. I want to create a directory B and a file \"myfile.txt\" inside B.

How to do th

Answer 1

You could create a function that parses argument with sed;

atouch() {
  mkdir -p $(sed 's/\(.*\)\/.*/\1/' <<< $1) && touch $1
}

and then, execute it with one argument:

atouch B/C/D/myfile.txt