ccmsrv offline [/y]
Use this command when you want to make a database server unavailable to all users. Send a broadcast message warning users of your intention to take the server offline. For instructions about sending a broadcast message, see ccm message.
The users for this command are Informix-Admin group member and local administrator.
You must run this command on the machine where the database server resides.
An example of this command is available in Taking a database server offline.