In this post we will discuss how we can change the SharePoint 2010 site logo using PowerShell. Also you can check out my previous posts on:
SharePoint 2010 site default logo comes from the _layouts/images/ folder.
If you want to put your new logo then you can put your logo to a folder where you have read access. Also you can put your logo to Assets Library also.
Below is the PowerShell script:
$web = Get-SPWeb "http://SiteURL"
$web.SiteLogoUrl = "http://Path of the image file"
$web.SiteLogoDescription = "EnjoySharePoint.com company Logo"
After this refresh the page, the new logo should appear.