PowerShell Commands to install - Activate -UnInstall -De Activate SharePoint 2010 Features

Install - SharePoint Feature :

Install-SPFeature FeatureFolderName

Activate - SharePoint Feature :

Enable-SPFeature FeatureFolderName -Url SiteURL(http://testsite/)

Uninstall - SharePoint Feature :

Uninstall-SPFeature FeatureFolderName

De-Activate SharePoint Feature : 

Disable-SPFeature FeatureFolderName -Url SiteURL(http://testsite/)

Source Link :
1. https://technet.microsoft.com/en-us/library/ff607825(v=office.14).aspx
2 .https://msdn.microsoft.com/en-us/library/office/ms442691(v=office.14).aspx