SharePoint Feature Installation, Activation, Deactivation, and Uninstallation using PowerShell

To install a SharePoint feature with PowerShell

Install-SPFeature FeatureFolderName

To activate a feature

Enable-SPFeature FeatureFolderName -Url http://server/site/subsite

To deactivate a feature

Disable-SPFeature FeatureFolderName -Url http://server/site/subsite

To uninstall a feature

Uninstall-SPFeature FeatureFolderName

Examples:

Activate site collection feature

$site = Get-SPSite http://sp2010

Enable-SPFeature -Identity �FeatureName� -Url $site.Url

$site.Dispose()

Activate site feature

$web = Get-SPWeb http://sp2010

Enable-SPFeature -Identity �FeatureName� -Url $web.Url

$web.Dispose()

Activate site collection features for all site collections in a Web Application

$webApp = Get-SPWebApplication -Identity http://sp2010

$webApp | Get-SPSite -limit all | ForEach-Object {Enable-SPFeature -Identity �FeatureName� -Url $_.Url}