Command-Line Management in vSphere 5.0 for Service Console Users
ESXi 5.0
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.
Important Changes made to the host using the DCUI, the vSphere Client, ESXCLI, or other administrative tools are committed to permanent storage every hour or upon graceful shutdown. Changes might be lost if the host fails before they are committed.