PowerShell vs stsadm in SharePoint 2010 - Solution Deployment

• Add solution
• stsadm –o addsolution –name SharePointProject2.wsp
• Add-SPSolution c:\code\SharePointProject2\bin\debug\SharePointProject2.wsp

• Deploy Solution
• stsadm –o deploysolution –name SharePointProject2.wsp –url http://moss-server –allowCasPolicies –immediate
• Install-SPSolution –Identity SharePointProject2.wsp –WebApplication http://sp2010 -GACDeployment

• Upgrade Solution
• stsadm –o upgradesolution –name SharePointProject2.wsp –filename SharePointProject2.wsp –immediate –allowCasPolicies
• Update-SPSolution –Identity SharePointProject2.wsp –LiteralPath c:\code\SharePointProject2\bin\debug\SharePointProject2.wsp –GACDeployment

• Remove Solution.
• Uninstall-SPSolution –Identity SharePointProject2.wsp –WebApplication http://sp2010
• Remove-SPSolution –Identity SharePointProject2.wsp

Source:
http://www.dotnetmafia.com/blogs/dotnettipoftheday/archive/2009/12/02/adding-and-deploying-solutions-with-powershell-in-sharepoint-2010.aspx