Most of your utilities are from unix but are not available on windows. Cygwin provides these as it is a unixy platform and hence they are available when you run perl under cygwin. When you use Strawberry perl it is under windows and thus any calls via command will be sent to the windows cmd shell, which then does not know about the utilities you are calling, or your syntax.

You could look at installing the Perl Power Tools which will give access to some of the utilities, but you still need to modify your syntax so it will work under windows.

In the end it will probably be simpler to translate it all into perl code anyway, as the examples you show can all be done in perl pretty easily, and quickly.