SharePoint Power Shell Commands for adding solutions

Adding Solution:

Add-SPSolution "C:\WebPart.wsp"

Installing Solution:

Install-SPSolution –Identity WebPart.wsp –WebApplication http://contoso.com -GACDeployment

Update Solution if exists:

Update-SPSolution –Identity WebPart .wsp –LiteralPath “C:\WebPart .wsp” –GACDeployment