Period 3 Days Late Stomach Flu

BASH: assigning the output of a command to a variable

could not be easier, if you know how to do it:

 var = `command` 
 

(the symbol ` is not just a peak and is obtained by combining AltGr + ').
Or

 var = $ (command) 
 

And here's an example:

 chown `whoami`: `whoami` file.pdf 
 
 chown $ (whoami): $ (whoami) file.pdf