Use the below powershell commands to change the top bar text of central admin site. I use this text to concur the farm environment, like test, QA or Prod
$ca= Get-SPWebApplication -IncludeCentralAdministration | ?{$_.IsAdministrationWebApplication -eq $true};
$ca.SuiteBarBrandingElementHtml = “<div class=’ms-core-brandingText’>Central Administration- QA</div>“;
$ca.Update();
$ca= Get-SPWebApplication -IncludeCentralAdministration | ?{$_.IsAdministrationWebApplication -eq $true};
$ca.SuiteBarBrandingElementHtml = “<div class=’ms-core-brandingText’>Central Administration- QA</div>“;
$ca.Update();