Claudiu on SharePoint

Scenario:
You try to run a PowerShell script and the script fails with this message:
The local farm is not accessible. Cmdlets with FeatureDependencyId are not registered

Cause:
When you run this cmdlet to add a user to the SharePoint_Shell_Access role, you must have membership in the securityadmin fixed server role on the SQL Server instance, membership in the db_owner fixed database role on all affected databases, and local administrative permission on the local computer.

Fix:
Run this script in PowerShell:

Add-PSSnapin Microsoft.SharePoint.PowerShell -ErrorAction SilentlyContinue; 
Add-SPShellAdmin -UserName Domain\UserName;