Basic Linux file commands working in Windows 8.1
Some commands have always been the same for both Operating Systems* but now you can use whichever you prefer when working with files. Below are a few common ones that I have verified working in Windows 8.1.

ls, cd*, pwd, mkdir*, rm, cp, mv, touch, cat, ps, head, tail, date*, whoami, finger, uname -a, du, chmod, grep, find -iname, exit*, echo*