cmd open a file code example

Example 1: cmd open file with program

"C:\Program Files\Adobe\Photoshop\photoshop" "C:\Users\csterling\Documents\some document.pdf"

Example 2: open file explorer from cmd

Just use "open [path_to_dir]" in Unix or "start [path_to_dir]" in Windows as:
open .	#Open current directdory in Unix
start . #Open current directory in Windows