Command-Line Management in vSphere 5 for Service Console Users
ESXi 5.5 Update 1
Starting with vSphere 5.0, the service console (also called console OS or COS) with its associated Linux installation is no longer available. If you are currently using ESX service console commands, scripts, agents, or logs, this technical note helps you transition to an off-host implementation or to use the ESXi Shell in special cases.