How to install AD DS and create forest via PS?

Here is another small tip to create a new forest on a clean Windows Server 2012 R2, it installs AD DS, DNS and necessary administrative tools, and creates your forest, DNS entries etc.

Import-Module ServerManager
Install-WindowsFeature AD-Domain-Services
Import-Module ADDSDeployment
Install-ADDSForest -DomainName lab.infralib.com -DomainNetbiosName lab -SafeModeAdministratorPassword (ConvertTo-SecureString -String "YourPasswordHere" -AsPlainText -Force) -NoDnsOnNetwork -InstallDns -DomainMode Win2008R2 -ForestMode Win2008R2 -NoRebootOnCompletion -Confirm:$false
Add-WindowsFeature RSAT-AD-Tools
Restart-Computer

Very useful information about AD DS Deployment Cmdlets can be found at http://technet.microsoft.com/en-us/library/hh974720.aspx / http://technet.microsoft.com/en-us/library/hh472162.aspx