To start the ILOG CPLEX Interactive Optimizer, at your operating system prompt type the command:

A message similar to the following one appears on the screen:

Welcome to CPLEX Interactive Optimizer 11.0.0
  with Simplex, Mixed Integer & Barrier Optimizers
Copyright (c) ILOG 1997-2007
CPLEX is a registered trademark of ILOG 

Type help for a list of available commands.
Type help followed by a command name for more
information on commands.


CPLEX>

The last line, CPLEX>, is the prompt, indicating that the product is running and is ready to accept one of the available ILOG CPLEX commands. Use the help command to see a list of these commands.