How to touch a file and mkdir if needed in one line

Question

I need to touch a file with an absolute file name such as: /opt/test/test.txt, but I\'m not sure if there is /opt/test existed on the system. So the code should similar with thi

Answer 1

mkdir B && touch B/myfile.txt

Alternatively, create a function:

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

Execute it with 1 arguments: filepath. Saying:

mkfile B/C/D/myfile.txt

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