With the start tool you can start new workflows.

usage: cm start -u <user> [other options]
         [-pn <name1> <name2> ... | <id1> <id2> ...]
available options:
 -d,--domain                   domain for login 
                               (default=<builtin>)
 -pn,--processdefinition-name  names of workflows to start
 -p,--password                 password for login
 -u,--user                     user for login (required)
 -url                          url to connect to

The options have the following meaning:

start creates a new workflow for each specified name or ID. You can start multiple workflows of the same type by specifying the name or the ID several times. Use the processdefinitions tool (see Section 3.5.6, “Processdefinitions”) to list the available process definitions. Note that you can only start workflows of process definitions which are enabled.