In Server 2012 R2 and Windows 8.1, there are many useful new modules with cmdlets such as New-SmbShare which creates new file shares easily.
If you don’t have these cmdlets, you can often use WMI instead. That requires more investigation and googling, but once you have a code template, it works well.
To create new file shares as an Administrator, for example, try this:
$share = [wmiclass]"Win32_Share" $path = 'c:\logs' $name = 'LogShare' $maxallowed = 10 $description = 'Place log files here' $share.Create( $path, $name, 0, $maxallowed,$description,$null,$null)