dbstop stops a database server. The dbstop utility is a command-line utility only, available on both UNIX and Windows platforms.
In UNIX, dbstop can shut down a server on any node on the network. You must specify a server-name, as well as any connection parameters you specified when you started the server. Without the proper connection parameters, dbstop does not know how to connect to the server to tell it to shutdown.
The dbstop command-line options let you control whether a server is stopped, even if there are active connections.
For full details on when to use dbstop, see System Administration Guide: Volume 1 > Sybase IQ Startup > Database Server Shutdown.