Solution
The OVA based appliance is a closed sci-linux based server which has only few set of commands that are exposed by Rivebed.
The Linux installer based Analyis server is gives more control since this is an install based Analysis server.
At times you do need the cli based preset commands that come with OVA based appliance for different purpose like - rebooting the server, starting and stopping appinternals services, upgrade the software version etc
To get the list of those commands when you are logged in as root or any linux admin user which was created you can do the following on the cli.
root>
root>cli
>enable
>cofigure terminal
The command 'cli'
will let you enter the cli mode as OVA based appliance and you can use '?'
to see all the available list of preset commands.
*If you have any questions or issues please do open a technical support case.