Some usefull Powershell command lets used in SharePoint

Get-SPSite -Limit all | Select-Object Url, Owner, SecondaryContact | Format-Table -AutoSize

This one-liner returns a handy list of all the site collections in the farm, along with each site collection’s owner and secondary owner.

Get-SPSite | Get-Member

Running this command will show Owners and SecondaryContact to retrieve the names of the primary and secondary owners.

Get-SPWeb http://portal.contoso.com/mysteryweb | Select-Object Url, WebTemplate, WebTemplateId | Format-Table –AutoSize

This command will list the template and template ID used by the site.

Get-Command -Module Microsoft.Sharepoint.Powershell

This command lists all the SharePoint-related cmdlets: There are more than 500, which is too many cmdlets to digest at once. So, you can start refining any cmdlet searches with other parameters.

For example, the following one-liner gives you all the cmdlets that deal with site collections or SPSites as PowerShell refers to them:

Get-Command -Noun SPSite

You can substitute any cmdlet verb or noun in that command. You can also use wildcards like this:

Get-Command *SPSite*

If you have any queries and concerns do let me know.