For those looking for the default PIN for the bluetooth connection of a HP OfficeJet H470, it's 0 0 0 0.
Although it can be found in the manual somewhere, it's easily overlooked.
Sometimes, you need to temporarily start a service (such as SSH) to perform some maintenance task. PowerCLI can help you with this:
To start the SSH server on each host of a vCenter:
Get-VMHost | Get-VMHostService | ? {$_.Key -eq "TSM-SSH"} | Start-VMHostService
To stop the SSH server:
Get-VMHost | Get-VMHostService | ? {$_.Key -eq "TSM-SSH"} | Stop-VMHostService -Confirm:$false
As always, you can make adjustments to the oneliner to select another service to start/stop, or further limit the selection of hosts to a cluster or a group of hosts (e.g. filtered by name).