How to Enable SSH service on your VMWare ESXi 5 Server.
1. Login to your ESX server through vspher client
2. Go to -> configuration -> Security Profile as shown below
3. In the security profile under services click on the -> Properties (This will open the services properties window ) -> In this window Select SSH and click on Options
This will open SSH (TSM-SSH) Options and click on start.
(If you want to start this service by default, select * Start and stop with Host)