The installation should be done using root or sudoing. Moreover in order to use a specific user/group to owner the instance, I normally create first the user and add it to Wheel, Admin and any group you want, and after:

[root@xxx]# ./cinstall


Your system type is 'Red Hat Enterprise Linux 6 (x64)'.


Enter instance name <ENSEMBLE>: 

Enter a destination directory for the new instance.

Directory: /engine/ensemble

Directory '/engine/ensemble' does not exist.

Do you want to create it <Yes>? 


Select installation type.

    1) Development - Install Ensemble server and all language bindings

    2) Server only - Install Ensemble server

    3) Custom

Setup type <1>? 3


Disk blocks required  = 2792344

Disk blocks available = 15482688


How restrictive do you want the initial Security settings to be?

"Minimal" is the least restrictive, "Locked Down" is the most secure.

    1) Minimal

    2) Normal

    3) Locked Down

Initial Security settings <1>? 2


What user should be the owner of this instance? ensemble

A Cache account will also be created for user ensemble.


Install will create the following Ensemble accounts for you: 

_SYSTEM, Admin, SuperUser, CSPSystem and ensemble. 

Please enter the common password for these accounts: ensemble

Re-enter the password to confirm it: ensemble


What group should be allowed to start and stop

  this instance? ensemble


Do you want to configure additional security options <No>? y


What is the effective group for Ensemble processes <cacheusr>? ensemble


What is the effective user for the Cache SuperServer

  and its jobs <cacheusr>? ensemble

Hope helps